ASTM D5972 IP 435 Freezing Point Tester for Aviation Fuel

Model No. KR-F116

The automatic aviation fuel freezing point tester is designed for assessing the freezing point of aviation fuel, aiding in determining its low-temperature flowability. Utilizing the automatic phase transition method for rapid testing, this instrument offers accuracy, efficiency, and fully automated “one-click” completion of the test, making it an ideal choice for laboratory aviation fuel freezing point determination.

freezing point tester

Standards: SH/T 0770, ASTM D5972, IP 435

The instrument utilizes iSKvatorTM technology, featuring one-button start and fully automated operation throughout the testing process, including purging, cooling, maintaining constant temperature, heating, and result interpretation. This effectively frees up manpower and reduces human error.

The automatic phase inversion method is used for freezing point detection, and the test results are consistent with those obtained using the GB/T 2430 and ASTM D2386 methods

The instrument design adheres to ergonomic principles, utilizing a 12-inch touchscreen computer with an elegant interface, easy-to-use controls, and abundant information. It can display temperature and optical signal curves in real time, providing a clear and intuitive view of the testing process

The test requires only a tiny sample of 0.14mL to 0.16mL, with a testing time of about 15 minutes. It is easy to clean, fast, and efficient.

Dedicated Peltier/compressor hybrid refrigeration technology, intelligent temperature control, ensuring high efficiency and low-temperature refrigeration.
Automatic collection of test data: oil product name and number, experiment duration, purge timing, test results, etc.

The refrigeration testing program allows for the assessment of the instrument’s refrigeration effect at any time, effectively ensuring the precision of instrument testing.

The structural design is compact and reasonable, making it easy to replace test consumables and wear parts.
Can store no less than 5000 test result records, and provide management functions such as data query, printing, and deletion.
The instrument application can be upgraded via a USB flash drive.
RJ-45 network port, capable of connecting to the LIMS system.

High sensitivity, high stability

Utilizing a professional optical sensor with high sensitivity, stability, and anti-interference capability, it can accurately and rapidly detect the freezing point of oil samples.
PT100 platinum resistance temperature probe ensures high-precision temperature control of the instrument.
High-performance dedicated drying components effectively filter air moisture, eliminating the need for laboratory compressed gas and enhancing the safety and flexibility of instrument use.

Key components such as temperature sensors, solenoid valves, and Peltier devices are all sourced from high-end specialized components, ensuring high precision, long-term stability, exceptional durability, and minimal maintenance for the equipment.

Low energy consumption, low noise, no need for external refrigeration, stable and reliable long-term operation.

Parameters:

Testing standard	SH/T 0770, ASTM D5972, IP 435
Testing range	+20℃ to -80℃
Temperature resolution	0.1℃
Temperature accuracy	0.1℃
Repeatability	0.5℃
Reproducibility	0.8℃
Testing time	15min
Cooling method	Peltier/compressor hybrid refrigeration
Cooling rate	15°C/min ± 5°C/min, adjustable
Heating rate	10°C/min ± 0.5°C/min
Freezing point detecting	Optical sensor
Sample volume	0.14mL ~ 0.16mL
Safety	Login password protection Prompt after test ends Using a gas drying component, no compressed air required.
Operating interface	12-inch color touch screen
Data storage:	no less than 5000
Communication interfaces:	USB, RJ-45;
Data output:	printer, LIMS;
Total power:	1000W
Instrument operating environment:	temperature: 5~35°C
Humidity:	20~80% RH
Instrument power supply:	AC220V±10%, 50Hz
Overall dimensions:	430mm (width) × 510mm (depth) × 560mm (height)
Net weight of the instrument:	37KG

Portable Ferrous Debris Analyzer ASTM D8120

Portable Oil Ferrous Debris Tester is an important method for early warning and avoiding mechanical failures. It can detect worn parts at an early stage of wear, and serious losses can be avoided by replacing them. Existing abrasive particle monitoring methods all have some defects and deficiencies. For example, oil spectrometer is limited by carrying capacity and excitation energy, and cannot quantitatively monitor particles larger than 5 µm; the measurement results of ferrography are only relative coefficients rather than absolute concentrations. The use of the iron meter can directly measure the concentration of all ferromagnetic abrasive particles in the oil sample without processing the oil sample. The iron meter can analyze the content of iron abrasive particles in various samples of mineral oil, synthetic oil, hydraulic oil, gear oil and lubricating grease.

Oil Iron content tester ferrous debris

A: Detection hole, during calibration and measurement, the oil sample test tube is put into this hole

B: LCD screen

C: reset button

D: check key

E: “Working” status indicator light

F: “Calibration” indicator light

Features of Portable Ferrous Debris Tester ASTM D8120

1. Adopt patented sensor and signal processing circuit, with good stability, high sensitivity and resolution up to ppm level.

2. Oil sample transmission and measurement are carried out automatically, and one data can be measured in 10 seconds.

3. The oil sample does not need to be processed and can be directly injected into the oil bottle for measurement.

4. English and graphical interface, user-friendly operation.

Instrument parameters:

Power supply: AC220V±15%, 50-60Hz

Ambient temperature: 0℃～50℃

Storage temperature: -20℃～80℃

Working humidity: 20%-80% relative humidity

Storage humidity: 0%-95% relative humidity

Iron filing size: more than 1 micron

Maximum concentration range: 0-5500mg/L

Measurement sensitivity: down to 1 mg/L

Sample volume: 2ml each time

Power consumption: <100W

Product size: length X width X height (158mm*150mm*88mm)

Weight: 1500g

ASTM D8184 Oil Ferrous Debris Analyzer – PQ Index Tester

Standard: ASTM D8184

In terms of detection methods, the current iron content detection mainly includes atomic absorption method and atomic emission method. Although atomic absorption spectroscopy is accurate, it is slow and complex to operate. Atomic emission spectroscopy has been widely used, but it cannot effectively detect large wear particles (whether it is a rotary electrode or inductive ion coupling). Not sensitive to large particles can sometimes be fatal in monitoring and diagnosis, as particles with normal wear of the friction pair are generally less than 10 μ m, while metal particles larger than 15 μ m are generated due to abnormal wear.

ASTM D8184 PQ Index analyzer

As for the detection of iron particles, the remedy is to increase iron monitoring and use Ferrous Debris Monitor. The Ferrous Debris Monitor developed by our company is a measuring device based on the principle of electromagnetic induction. The measuring device is equipped with a sensitive electromagnetic coil. When the oil is placed in a magnetic field, the ferromagnetic abrasive particles in the oil will cause changes in the magnetic field intensity. The magnitude of the electromagnetic induction intensity of the coil is well correlated with the content of ferromagnetic abrasive particles. It can conveniently and quickly detect the content of ferromagnetic metal shavings in lubricating oil, hydraulic oil, and grease, thereby determining the mechanical wear condition.

PERFORMANCE CHARACTERISTICS

Patented sensor and signal processing circuit, good stability, high sensitivity.
Oil sample transfer, automatic measurement, 7 seconds to measure a data.
Supporting PC data management software, measurement data can be directly imported to the computer for data management, trend analysis, curve printing and so on.
Oil samples do not need to be processed and can be directly injected into the oil bottle for measurement.
Chinese (English) and graphical interface, easy for users to operate.
You can enter any number and letters to facilitate the user to name the file.

TECHNICAL PARAMETER

	Data
Power source	AC220V to 24V adapter — PQ300 3A charger + built-in rechargeable lithium battery (3200mA) — PQ300B
Ambient temperature	10℃～30℃
Display screen	7-inch
Repeatability	±4PQ or ±1% [maximum value]
Resolution	1PQ
Test time	7s
Measurable minimum	5PQ
Detect the range of abrasive particles	> 1μm ferromagnetic abrasive particles
Serial port connection	USB female port
Measuring range	0～15000PQ
Size	430mm225mm140mm（length * width * height）
Weight	4.7kg (PQ300)/5.1kg (PQ300B)

ASTM D6749 D7683 D8615 Freezing Point Tester 3 in 1

Instrument introduction:

The fully automatic micro-pour point, cloud point, and freezing point tester is designed and manufactured in accordance with standards ASTM D6749, ASTM D7683, and ASTM D8615. It is suitable for the determination of pour point, cloud point, and freezing point of petroleum products and aviation kerosene under these standards.

The fully automatic micro-dip point, cloud point, and freezing point tester is a fully automated instrument controlled by a PLC. Its operation is extremely simple. Users simply need to load the oil sample to be tested into a glass test cup, turn on the power switch, and press a button to start the test. The system will automatically carry out the test according to the user-selected test procedure. The instrument also features a self-checking function, which is executed first every time the test is initiated.

This instrument features a fully English-language interface. The turbidity and freezing points are detected using coaxial fiber optics, while the pour point is measured using the pneumatic method, ensuring higher accuracy. Upon completion of the measurement, the system will emit an audible alert, lock the display, and automatically save the measurement results.

ASTM D6749, ASTM D7683, and ASTM D8615 freezing point tester

Instrument features:

◇ Accurate and sensitive automatic detection of pour point, cloud point, and freezing point

◇ Fully automated testing process, with minimal sample usage and simple operation

◇ The turbidity and freezing points are detected using optical fiber, while the pour point is detected using the pneumatic method, achieving higher accuracy

◇ The refrigeration system is safe and environmentally friendly, as the metal bath does not require liquid refrigerant

◇ Ultra-fast cooling speed, with the cold bath reaching -90℃ from room temperature in just 15 minutes

◇ Ultra-low refrigeration depth, capable of reaching a refrigeration depth of -95℃

Technical parameters:

◇ Compliant with standards: ASTM D6749-24, ASTM D7683-21, ASTM D8615-26

◇ Detection range: -85℃ to room temperature

◇ Refrigeration depth: -95℃

◇ Sample volume: 4.5mL～5mL

◇ Test cup: Capacity approximately 12mL

◇ Detection method: Pour point: pressure method; cloud point, freezing point: fiber optic

◇ Temperature measurement: Robust metal material and Pt100 probe with built-in calibration program, equipped with 10 calibration points, temperature sensor outer diameter of 2mm, accuracy of 0.1℃, error less than 1%

◇ Detection interval temperature: pour point: 1℃~3℃; cloud point, freezing point: 0.1℃~1℃

◇ Preheating temperature: The sample is automatically preheated to 45℃ or 9℃ above the expected temperature, whichever is higher, but not exceeding 70℃. The bath temperature is maintained at 48℃ or 12℃ above the expected temperature, whichever is higher.

◇ Cooling rate: For metal bath cooling, when the expected temperature is above 40℃, the cooling rate should be 3℃ to 4℃ per minute; when the expected temperature is below 40℃, the cooling rate should be 0.8℃ to 1.1℃ per minute.

◇ End of heating: After the test is completed, the temperature will automatically rise to room temperature and then the heating will automatically stop

◇ Safety: System self-check, fault alarm, and heating cessation when temperature exceeds 70℃.

◇ Cold bath medium: metal bath, without liquid refrigerant

◇ User interface: 7-inch color LCD display unit, resolution: 1024*600

◇ Host dimensions and weight: W410×D500×H490mm, 21kg

◇ Power supply: AC 220V ±5%

◇ Power: <1000W

◇ Storage: 10,000 historical data entries, with optional printing

◇ Interfaces: LIMS interface, USB interface for connecting U-disks; printer interface; FL-LAB software; RS485; RJ45

High Frequency Infrared Carbon Sulfur Analyzer

Model: KR-CS660

carbon sulfur analyzer

High frequency infrared carbon sulfur analyzer accurately determines the content of carbon and sulfur elements in steel, iron, new energy, alloys, non- ferrous metals, black metals, rare earth metals, coal, cement, ore, glass, and other materials.

Features:

Adopting low noise and high sensitivity pyroelectric infrared sensors, testing selected carbon dioxide and sulfur dioxide filters, providing precision assurance for the analysis of high and low carbon materials. Combined with programmed heating, it effectively reduces the impact of instrument comprehensive background interference on the analysis results.

Shielding devices have been added to the signal source and power cord, and anti-electromagnetic wave leakage devices have been installed in the infrared analysis host, high-frequency oscillation system, and high-voltage part respectively.

Advanced and reasonable gas circuit design, selection of digital pressure control system and high-precision control for stable analysis of flow rate, making the stability performance of analysis data more excellent.

The automatic reverse blowing ash discharge system and automatic cleaning furnace head system can effectively reduce the impact of dust on carbon and sulfur element analysis.

Add an efficient physical dehydration device in the traditional analysis gas circuit to improve the analysis effect of
crystallization on sulfur during combustion of special samples.

The infrared analysis cell adopts high-precision isothermal electronic heat balance technology, effectively improving the repeatability and reproducibility of sample analysis data.

The unique full range linear calibration technology, combined with weight linear compensation, pressure, flow rate,
temperature compensation, ensures the analysis accuracy of unknown samples from low to high content within the full range.

The optimized design adopts air-cooled ceramic power tubes to improve the heat dissipation effect of the power tubes, the stability of high-frequency induction heating, and the consistency of sample melting.

For more details, please contact with us.

Volumetric Method Karl Fischer Titrator

Model: KR-VK80

volumetric karl fischer titrator

This instrument adopts the Karl Fischer volumetric method principle and complies with the GB/T 11133 Liquid Petroleum Product Water Content Determination Karl Fischer Method, GB/T 6283 Chemical Product Moisture Determination Karl Fischer Method, Chinese Pharmacopoeia Moisture Determination Method I, Karl Fischer Method and other method standards.

Main functions:

Using STM microchip processor control, automatic intelligent analysis and determination of moisture content.
Two large color Chinese touch LCD screens (resolution 1024 * 600 pixels) display.
The surface is treated with electrostatic spraying, which is corrosion-resistant and easy to clean;
Practical auxiliary functions that can connect the “electronic balance” with instrument data communication and processing; (Alternative).

5. Instruments automatically absorb and discharge liquid, greatly reducing manual measurement errors.

6. Powerful storage functions, automatic storage of 1000 measurement results, and easy access to historical records at any time.

7. Instruments automatically measure samples, display analysis results, and calculate the average value of multiple sample measurements.

Automatically calculate and print ug/ppm/percentage content/mg/L/sample name/experimental date, etc.
Instrument program can be upgraded when national standards are revised.

Main technical indicators:

Display mode:	Large screen display with color touch screen in both Chinese and English
Measurement method:	Microprocessor control (Karl Fischer capacity method)
Water content range:	0.001%（10ppm）—100%
System error:	≤± 0.2% (excluding injection error)
Drift compensation:	Microprocessor automatic control
Mixing speed:	Adjustable control
Endpoint indication:	Screen display/sound warning
Data input:	Touch screen operation input
Self-checking function:	Automatic diagnosis of instrument faults
Power consumption:	Less than 40W
External dimensions:	375×440×285mm
Usage environment:	Temperature 5 ℃ -40 ℃, humidity ‹ 85%
Power Supply:	AC220V±10% 50HZ±2.5HZ

Insulating Oil Gas Evolution Tester

Model: KR-ET80

The gas evolution tester is designed and manufactured according to the requirements specified in GB/T11142-89 Insulating oil-Determination of gassing under electric stress and ionization and NB/SH/T0810-2010 Insulating oil-Determination of gassing under electric stress and ionization. It is widely used in petrochemical, electric power, railway, scientific research and other departments, and is an indispensable equipment for oil analysis and quality inspection.

Principle

After the insulating oil is dried and saturated with hydrogen, the insulating liquid and the hydrogen layer on the liquid surface are subjected to the action of radial electric field under the conditions of voltage of 10 kV, frequency of 50 Hz, oil temperature of 80 ℃ and test time of 120 min, and the oil and hydrogen interface tend to absorb or release gas due to discharge reaction.

Functional features

lDifferent standards are integrated into one, and customer selectivity is high

lWith safety protection switch, the instrument is safe and reliable to use

lElectronic flowmeter is adopted, and the replacement standard does not need to be adjusted artificially

lAutomatically store 1000 test results, so view or print at any time

lThere are external status indicator lights and prompt sounds to prompt the operator in real time

lImported temperature control module, high-precision temperature control

lWith oil drain valve, easy to change oil

l7.0-inch color touch screen, Chinese display, built-in flow chart, wizard-style operation

Technical parameters

Hydrogen intake pressure	0.05～0.1 MPa
Constant temperature	80℃±0.05℃ (adjustable range is room temperature ～100℃)
Resolution	0.01℃
Test voltage	10 kV±0.2 kV
Resolution	0.01 kV
Time measurement	5 min, 10 min, 50 min, 120 min (automatic conversion according to standard)
Timing error	<±0.1 s
Operating Temperature	(10～40)℃
Relative humidity	<85% RH (no condensation)
Heating power	≤1500 W
Stirring speed	1200 rpm
Power supply voltage	AC220V±10％ 50Hz±10％
Power consumption of the whole machine	≤1700 W
Overall dimensions	Controller 320 mm×305 mm×195 mm; High voltage generator 320 mm×305 mm×380 mm; Gas evolution tester 320 mm×305 mm×590 mm

ASTM D445 Automatic Kinematic Viscosity Bath

Model: KR-KV57

astm d7279 kinematic viscometer

The fully automatic kinematic viscosity tester is designed and manufactured according to the requirements specified in GB/T265 Petroleum products – Determination of kinematic viscosity and calculation of dynamic viscosity and ASTM D445. The instrument measures the kinematic viscosity of transparent and opaque liquids including crude oil, light and heavy fuel oil, lubricating oil, additives and waste oil. It is used in electric power, petroleum, chemical industry, commodity inspection, scientific research and other sectors.

Principle

The instrument loads the sample into the ubbelohde viscometer, the instrument heats the constant temperature bath to the set temperature and maintains it constant according to the parameter settings. When the temperature reaches equilibrium, the instrument automatically starts the test, carries out a series of samples extraction, and automatically detects the sample fall back time, then automatically calculates the test results after the test is completed, and automatically cleans the viscosity tube, and the test is over.

Functional features

Ultra-humanized design, constant temperature, detection, calculation, cleaning, drying, and other operations are completed with one button.

lSimultaneous asynchronous measurement of kinematic viscosity of two samples, automatically print the results.

Simultaneous determination of the kinematic viscosity of two samples, automatically store and print test results.

Infrared liquid level detection is not interfered by indoor light and lighting, and the liquid level detection position can be adjusted flexibly.

Advanced optical waste liquid monitoring function to prevent waste liquid from flowing into the suction filter pump and damaging it.

Stainless steel plus double-layer tempered glass oil bathtub, preventing surface condensation when testing low-temperature samples, which will affect observation.

Adopting the combination of imported temperature controller and imported temperature sensor for temperature control, and the temperature control accuracy is high.

16 groups of preset parameters are available for selection, and the preset parameters can be modified to meet the requirements of measuring special liquids.

Equipped with an overflow port to prevent excessive oil from overflowing into the machine.

Equipped with oil discharge port which is twisted to drain the oil, easy to replace the bath oil.

Dual CPU microcomputer control with automatic fault diagnosis program.

Additional refrigeration equipment can be added according to the user’s needs.

Technical parameters

Temperature control range	20～100℃ (20℃ – room temperature should be equipped with optional circulating refrigerator)
Temperature control precision	±0.01℃
Resolution	0.01℃
Viscosity resolution	0.00001 mm2/S
Test hole	2 holes
Temperature sensor	Imported stainless steel PT100 temperature probe
Heating method	Electric heating unit, maximum heating power 1500 W, PID control
Liquid level detection	Infrared photoelectric detection
Temperature calibration	6-point calibration
Data storage	100 sets of test results
Ambient temperature	5℃～40℃
Ambient humidity	≤85% RH (no condensation)
Power supply voltage	AC 220V±22V 50Hz±5Hz
Display	7-inch color touchscreen
Overall dimensions	370 mm × 300 mm × 650 mm
Instrument weight	28 kg

Ordering Guide

Material Code	Product Name	Specifications
0302003002	Kinematic viscosity tester	KR-KV57
0302003017	Kinematic viscosity tester (with condenser tube)	KR-KV57
0202003042	Dual-way vacuum pump	KR-KV57-130
0103010045	Ubbelohde viscometer	1.0 mm
0103010046	Ubbelohde viscometer	0.8 mm
0103010043	Ubbelohde viscometer	1.5 mm
0103010115	Ubbelohde viscometer	0.6 mm
0103010044	Ubbelohde viscometer	2.0 mm
0103010078	Ubbelohde viscometer	0.4 mm
0103010047	Ubbelohde viscometer	1.2 mm

ASTM D7279 Automatic Kinematic Viscometer

Model: KR-KV58

astm d7279 kinematic viscometer

The fully automatic kinematic viscosity tester is designed and manufactured according to the requirements specified in ASTM D7279-2018 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids by Automated Houillon Viscometer and NB SH/T 0956-2017 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids by Automated folding tube type Viscometer. The instrument measures the kinematic viscosity of transparent and opaque liquids including crude oil, light and heavy fuel oil, lubricating oil, additives and waste oil. It is used in electric power, petroleum, chemical industry, commodity inspection, scientific research and other departments.

Principle

The instrument heats the constant temperature bath to the set temperature and maintains it constant according to the parameter settings. The sample is injected into the folded tube viscometer, and the falling time of the sample is automatically detected. After the test is completed, the instrument automatically calculates, stores and prints the test results.

Functional features

l7.0-inch configuration LCD screen, body-sensitive keys

lThere are many types of measurement samples. Transparent and opaque samples can be measured, including residues, gasoline, diesel, kerosene, cutting fluids, lubricating oils, new and in-service oils, etc

lLow oil sample consumption, fast detection speed, low solvent consumption, high accuracy

lWith automatic diagnostic fault program

lStainless steel bath box, oil discharge port, convenient oil discharge

lThe kinematic viscosity value of four kinds of samples can be measured asynchronously at the same time, and the results can be automatically printed

lAdopting motor stirring reduces the temperature decreasing gradient in the bathtub, makes the oil temperature uniform, and improves the accuracy of the experimental results

lThe upper part of the bathtub is equipped with a new energy-saving lighting lamp, so that the operator can clearly observe the test process and facilitate data observation.

Technical parameters

Display mode	7-inch color touch screen
Temperature control range	Room temperature ～100
Temperature control precision	±0.01℃
Resolution	0.01℃
Measurement range	(0.75～6800) mm2/s
Viscosity resolution	0.0001 mm2/s
Oil sample consumption	0.1～2.0 mL
Viscometer Type	Folding tube type (Hou’s)
Test hole	4 holes
Liquid level detection	Infrared photoelectric detection
Temperature correction	6-point calibratio
Data storage	100 sets of test results
Temperature sensor	Imported stainless steel PT100 temperature probe
Heating method	Electric heating unit, maximum heating power 1500 W, PID control
Oil bath volume	About 10 L
Viscosity tube cleaning	Manual
Viscosity tube drying	Automatic
Data output	RS232
Clock display	Year, month, day, hour, minute (It can work when the power is down)
Ambient temperature	5℃～40℃
Ambient humidity	≤80% RH (no condensation)
Power supply voltage	AC 220V±22V 50Hz±5Hz
Overall dimension	320 mm × 440 mm × 600 mm
Instrument weight	30 kg

Ordering guide

Material Code	Product Name	Specifications
0302001054	Kinematic viscosity tester	YC-KV58
0202003128	Single-way vacuum pump	YC-KV58-130
0202003130	Houillon viscometer	0.2 mm
0202003131	Houillon viscometer	0.4 mm
0202003132	Houillon viscometer	0.7 mm
0202003133	Houillon viscometer	1.0 mm

ASTM D4052 Density Meter for Petroleum Oil

Model No. : KR12D

ASTM D4052 density meter

The KR12D automatic constant temperature petroleum density meter is suitable for measuring the density and relative density of liquids. This method measures the density of liquids according to the principle of different oscillation frequencies when the double U-shaped tubes are filled with different media. It conforms to GB/T2013-2010 and GB/T29617- 2013 and SH/T0604, ASTMD4052. After pumping the liquid to be tested into the resonant cylinder sensor, the single-chip microcomputer will process the measurement data and automatically measure the density value of the petroleum product. It is composed of double tuning fork density sensor, vibrating tube circuit, temperature measuring circuit, CPU, display, constant temperature bath, liquid inlet pump and control panel. This liquid densitometer can be widely used to measure the density of various liquids, and with different concentration conversion software, it can also directly read the concentration value of the corresponding liquid, such as alcohol. Through the processing of the single-chip software, the volume concentration data can be directly read , The test is more convenient.

Performance characteristics

Constant temperature control: Because the density of the liquid is greatly affected by temperature, the density of the liquid detected at the real-time temperature should be converted to the density of the liquid at 20°C. This instrument is controlled by a constant temperature bath. The sensor and its components and sample liquid are sealed in the constant temperature bath. The temperature of the oscillating tube (sample liquid) is detected by the temperature sensor, and the electronic components are controlled by the single-chip microcomputer to cool or heat to ensure the constant temperature bath. The temperature is stable within the range of 20℃±0.1℃. This not only solves the troubles and errors caused by conversion, but also ensures the measurement accuracy, stability and repeatability of the instrument (the constant temperature value can be customized according to user requirements).
Directly display the density value of the liquid at 20°C, and display the temperature: the oscillation frequency of the sensor is detected by the single-chip microcomputer, and the mathematical model of the relationship between the sensor frequency and the density of the liquid is used to obtain the density value of the liquid, and then perform floating point calculations. In the operation process, no additional error will be caused due to insufficient operation digits, and the accuracy of the measurement result is guaranteed. The density value calculated by the single-chip microcomputer is displayed through five digits, and there is a temperature display window.
Automatic sampling: The single-chip microcomputer controls the stepping motor to drive the peristaltic pump to suck samples, which improves the degree of automation of the product.
Acid and alkali resistant pipelines: all the pipelines that are in direct contact with liquids are imported acid and alkali resistant pipes to ensure that the instrument can measure acid and alkali solutions.
Data storage and transmission: Built-in storage chip, can store 80 groups of test data, and can be recalled and deleted. It can be connected to the computer through the 232 interface according to user requirements (customized).
Calibration function: When the instrument is not used for a long time, it will drift. This instrument can use 20 ℃ pure water as a standard to calibrate the instrument. This is a function that the glass density meter cannot achieve.

The main technical parameters

Density measurement range: 0.001~1.999g/cm3

Density measurement accuracy: ±0. 001g/cm3 or ±0.0005g/cm3

Density value resolution: ±0. 001g/cm3 /0.0005g/cm3

Constant temperature control: 20℃±0.1℃ (can be customized to any temperature between 15~35℃)

Sampling volume: 2ml/time

Data storage: 80 groups

Environment temperature requirement: 5℃~35℃

Power supply: 220V±22V, 50Hz±1 Hz, 50VA

Dimensions: 206mm×205mm×200mm

Instrument weight: 3.2Kg