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Anonymous users2024-02-05Most portable formaldehyde detectors use electrochemical sensors, and HTV is no exception. This sensor is one of the most common gas sensors with high sensitivity, fast response and precise measurement. However, these sensors are susceptible to the influence of other substances that can undergo redox reactions, and problems such as high measured values or unstable readings.
Therefore, it is recommended to store it in a closed environment and calibrate it before use.
From the appearance, it can be seen that the HTV formaldehyde detector has few buttons, so it is very convenient to use. When you need to measure, simply press the S sampling button to get the measurement result. In the outdoors, the formaldehyde content is very low, generally the following; The indoor formaldehyde measurement value is generally around the limit, and if it is exceeded, it means that the formaldehyde content exceeds the standard.
The HTV-M is an upgraded version of HTV, which not only has the function of quickly measuring formaldehyde concentration, but also can customize the detection schedule, which is very suitable for fumigation room concentration monitoring.
Formaldehyde detectors are relatively squeamish among all instruments, so special attention is required during use. One of the most common problems encountered with this type of instrument is that the measurement value is too high: sometimes the above results are obtained when measured outdoors, which can be very confusing.
There are two reasons for this result, one is that the instrument has previously measured a high concentration of formaldehyde, and the sensor is contaminated and has not recovered. The other is a calibration error that needs to be recalibrated.
The first problem is easy to solve, as it only takes one cleaning procedure and the instrument is placed in clean air for 2-3 days to recover automatically.
To determine whether the instrument is restored or not, you can perform the following operations:
l Press the " " and "on" buttons at the same time, the instrument will power on and display the "gain" gain setting.
l There will be 2 values scrolling on the screen, e.g. 1632, e016.
l If the first value is between 3300-6200 and the second value is between E016-E018, it means that the sensor is normal. Otherwise, another pneumatic path cleaning can be carried out.
The second problem requires recalibration, and the calibration steps are much the same for most instruments:
l Press and hold " " and " " and then press the "on" button to power on the instrument, return the instrument to factory settings and turn it off.
l Press "on" to power on, connect the calibration tube, and press " " and " " " at the same time " " to start calibration of the instrument.
l Check the standard reading on the calibration tube, and adjust the instrument reading to be equal to the standard reading after the measurement.
l Calibration completed.
As mentioned above, the sensor of the formaldehyde meter is very squeamish, and if it is exposed to high concentrations for a long time, it will be contaminated, making the measurement results inaccurate. HTV has designed a solution specifically for this situation, and the user can change its recovery time by adjusting the measurement accuracy of the sensor, and the lower the measurement accuracy, the shorter the recovery time. This means that if the formaldehyde concentration to be measured is very high, the accuracy of the instrument is reduced to achieve a fast measurement.
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Anonymous users2024-02-04ET-4160 portable, high-precision formaldehyde analyzer is an instrument used to accurately measure the concentration of formaldehyde in indoor air, built-in high-sensitivity and high-stability Voltametric electrochemical sensor patented by Interscan in the United States, which can quickly and accurately detect and analyze the formaldehyde concentration in the air in a variety of environments, and the detection results are stable and accurate. The instrument has a built-in rechargeable battery and sampling pump, and the portable design is convenient to carry to the site for testing, which can meet the accurate detection needs of indoor air quality, health and epidemic prevention, health supervision, environmental protection, environmental sanitation, labor hygiene, petrochemical and other fields under various conditions. Formaldehyde content digital direct-reading formaldehyde concentration instrument.
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Anonymous users2024-02-03ET-4160 portable, high-precision formaldehyde analyzer is an instrument used to accurately measure the formaldehyde concentration in indoor air, with a built-in high-sensitivity and high-stability Voltametric electrochemical sensor patented by Interscan in the United States, which can quickly and accurately detect and analyze the formaldehyde concentration in the air in a variety of environments, and the detection results are stable and accurate.
The instrument has a built-in rechargeable battery and sampling pump, and the portable design is easy to carry to the site for testing, which can meet the needs of accurate beam inspection and shielding in the fields of indoor air quality, health and epidemic prevention, health supervision, environmental protection, environmental sanitation, labor health, petrochemical and other fields under various conditions. Formaldehyde content slag judgment digital direct-reading formaldehyde concentration instrument.
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Anonymous users2024-02-02Measuring range: ET4160-1 type: 0, resolution:
PPMET4160-2 Type 0 50ppm, Resolution: PPMET4160-3 Type 0 1000ppb, Resolution: 1 PPbet4160-4 Type 0 1999ppb, Resolution:
1 ppb accuracy: 2%.
Linearity: Gaona.
Reproducibility:
Zero Drift:
Span Drift Imitation:
Sampling method: continuous pumping type, 1L min.
Dimensions: 178mm 102mm 225 mm Weight: 2kg
Greini's air catalyst removes formaldehyde and has a good effect.
Formaldehyde detection has national standards that can be followed, the detection principle is actually very simple, the most commonly used in the laboratory is also particularly suitable for measuring indoor formaldehyde is the phenol reagent method, the conditional will use chromatography, the instrument is more expensive than the cost of detection. >>>More
The green source is garbage, not unstable, without any reference significance, it is all false values. It's a pure waste of my money. I bought a six-in-one, and the several values of the test are not accurate except for the temperature and humidity that may be slightly closer. It's rubbish, it's rubbish, it's rubbish.
It seems that Xuzhou Jincheng Instrument uses a JCTSL 230 sensor.
In fact, I have used Lekong for household formaldehyde detectors, which use laser technology from the United States, and the accuracy is also very high.