Interscan4160 formaldehyde detector/4160-19.99m formaldehyde analyzer from the United States

NegotiableUpdate on 03/29

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Overview

Interscan4160 formaldehyde detector/4160-19.99m formaldehyde analyzer from the United States

Product Details

Interscan4160 formaldehyde detector from the United States, CPA (Certificate of Approval for Imported Measuring Instruments) from the National Bureau of Technical Supervision4160-19.99m digital portable analyzerIt is a direct reading instrument produced by the globally renowned manufacturer Interscan in the United States, specifically used for indoor air quality testing, health and epidemic prevention, health supervision, environmental protection, environmental hygiene, labor hygiene, and petrochemical industries to detect formaldehyde content.
The instrument has a built-in sampling pump powered by a battery, and the detection component is an electrochemical sensor with high sensitivity, stability, and accuracy. The sensor is linearly stable and the results are accurate.Our company isInterscanAgents in China
Related certificate: CPA (Certificate of Type Approval for Imported Measuring Instruments) issued by the State Administration for Technical Supervision
The main features of the Interscan4160 formaldehyde detector in the United States are:
High precision electrochemical sensor using patented technology with short response time, continuous pump suction sampling, small volume, light weight, simple operation, and easy portability
Technical indicators:　
Measurement range: 0-19.99 ppm
Resolution: 0.01ppm
Accuracy: ± 2% reading+0.01ppm
Response time:<60 seconds
Linearity: ± 1.0%
Reproducibility: ± 0.5%
Zero drift: ± 1.0%/24h
Span drift: ± 2.0%/24h
Sampling method: continuous pump suction, 1L/min
Volume: 178mm × 102mm × 225mm
Weight: 2kg
Annotation:4160-19.99m is the original 4160-2 type. Interscan has made unified changes to the 4000 series product models to more intuitively reflect the correspondence between models and ranges. The original -0 type corresponds to -1999m type, -1 type corresponds to -19.9m type, -2 type corresponds to -19.99m type, and -3 type corresponds to -1999b type.
Remarks:
Working principle
2.1 Sensor: The sensor of this instrument is a two electrode sensor, which has a series of advantages that are not present in three electrode sample extraction sensors and diffusion sensors. The electrolyte of the sensor is inactive, similar to the electrolyte in flashlights and nickel cadmium batteries. No need to consider battery damage or acid damage to the instrument. The sensor has a sealed air storage chamber, which not only prolongs its lifespan but also eliminates the possibility of reference electrode contamination, eliminating the disadvantage of three electrode sensors requiring air for operation and making it suitable for anaerobic environments. Sample extraction sensors are highly sensitive detectors, with sensitivity 50-200 times greater than diffusion sensors depending on the type of gas. This is a crucial condition for measuring low concentration gases.
Conversion relationship between formaldehyde mg/m3 and ppm: ppm=mg/m×B/M
* In the above equation: B： The molar volume of gas under standard conditions (at 00C, B=22.4; 250C=24.46 liters) M: The molecular weight of the substance being tested (formaldehyde HCOH M=30) is ppm=mg/m × 22.4/30=mg/m × 0.74666. The formaldehyde concentration index in public places is 0.12mg/m. Calculate the relationship between mg/m and ppm according to the formula: 0.12mg/m=0.0896ppm at 00C 0.12mg/m=0.0978ppm at 250C Appendix: 1000ppb=1ppm
Usage method
1. Check the battery: Before use, it is necessary to check the condition of the rechargeable battery. Set the Function switch to BAT, TEST“A”， If the battery is intact, a value of 100 or higher will be displayed on the LCD display panel (ignoring any decimal points when checking the battery). When fully charged, it can be used continuously for 12 hours. Turn the Function switch to BAT.TEST "B". This position tests the amplifier battery of the analyzer. This set of alkaline batteries supplies power to the sensors and remains in a ready state regardless of whether the analyzer is turned on or off. For safety reasons, it is best to replace the battery before the LCD display drops below 100.
2. Alarm setting: Usually, factories set the alarm at 50% of the full scale, and the alarm can be reset through the following methods.
(1) Set the Function switch to zero (ZERO). Rotate the 'zero' knob to display the required alarm concentration value on the LCD.
(2) Rotate the ALARM SET clockwise until the alarm light flashes. If the alarm value is already active, turn the ALARM SET button counterclockwise until the alarm value stops, then turn it clockwise back to the alarm light just to flash.
3. Instrument zeroing: Instruments often require on-site zeroing before use. Zero point adjustment is performed in the SAMPLE mode, where the gas is filtered into zero gas using a C12 filter in the sampling space.
4. Sampling gas: Set the Function switch to the SAMPLE position to activate the pump and place the analyzer in sampling gas mode. After the instrument stabilizes, it displays the concentration value of formaldehyde gas, with a sampling flow rate of approximately 1 liter per minute.