Fixed CH2O gas detector is used to detect and monitor formaldehyde concentration. The formaldehyde gas detector has remote control with optional output signal 4-20mA&RS485, with functions of sound & light alarm, real time display and 24 hours online work.
Anti-magnetic interference
- The fixed formaldehyde gas detector can resist the strong magnetic interference of 15V/meter.
- In areas with dense magnetic products or dense electronic products, such as tunnels, mines, confined spaces, etc., the data is guaranteed to be stable and reliable.
Using high-precision sensors
- The fixed online CH2O gas detector is equipped with an infrared remote control as standard, which can realize the functions of alarm point setting, zero point calibration, and address modification without opening the cover.
- Compatible with various control alarms, PLC, DCS and other control systems to realize remote monitoring.
Variety of installation methods
- Wall mounted type, installed on the wall directly, real time monitoring.
- Piping type, installed on the pipeline, monitoring the gas concentration inside.
- Flow type, connected with external sampling pump and tube, measure the gas concentration in enclosed space.
Applications
Fixed formaldehyde CH2O online gas detector can detect harmful gas of furniture, flooring, wallpaper, paint and other items, which is widely used in biological pharmaceutical factories, green home, livestock and poultry breeding, greenhouse cultivation, warehousing and logistics, brewing and fermentation, agricultural production, etc.
| Model | GD300-CH2O |
| Detection Principle | Electrochemistry |
| Gas | Formaldehyde (CH2O) |
| Range (Optional) | 0-10 ppm |
| 0-20 ppm | |
| 0-50 ppm | |
| 0-100 ppm | |
| Resolution | 0-10 ppm, 0-20 ppm, 0-50 ppm, 0-100 ppm, 0-500 ppm, 0-1000 ppm |
| Accuracy | 0.01ppm (0-10/20/50ppm), 0.1ppm (0-100ppm), 1ppm (0-500/1000ppm) |
| Responce Time | ≤10s |
| Repeatability | ≤±1% |
| Recovery Time | ≤10s |
| Linearity Error | ≤±1% |
| Zero Shift | ≤±1% (F.S./year) |
| Signal Output (Optional) | 4-20mA and RS485Â Relay output: one group of relay output (1NO+1NC, 24V 100mA) for one alarm (default), or two groups of relay output (2NO+2NC, 24V 100mA) for high/low alarm (optional). |
| Alarms | Sound, light |
| Display | High light nixie tube display |
| Installation | Wall-mounted, piping type, flow-type (according to the detected environment) |
| Connection | Power connection type: G1/2 male thread explosion-proof flexible pipe Pipe-mounted type: M45*P2.0 |
| Operating Time | 24h |
| Explosion-proof Grade | Ex d llC T6 |
| Protection Grade | IP65 |
| Certification | CE, ATEX |
| Working Voltage | 12~36V DC |
| Case Material | Die-casting aluminum housing |
| Operating Temperature | -20℃~50℃ |
| Operating Humidity | 0~95%RH (non-condensing) |
| Dimension | 206*179*90mm |
| Weight | ≤1.6kg |
| Accessories | Power adapter: Input 100-240VAC 50/60Hz, Output 24VDC 2A (Optional USA plug & Europe plug) |
Note: To measure confined spaces such as pipelines, please contact us and inform the detailed conditions of use.
Fixed Formaldehyde (CH2O) Gas Detector Dimension (Unit: mm)
SISCO Gas Detector Catalogue.pdfQ1: What is a fixed gas detector?
A1: The fixed gas detector is composed of sensors and transmitters, and is installed at the detection site. The secondary instrument consisting of circuit, power supply and display and alarm device is installed in a safe place, which is convenient for staff to monitor. In industrial installations and production processes, fixed gas detectors are generally used, because fixed gas detectors can be installed at specific detection points to detect specific gas leaks.
Q2: What does a gas detector detect?
A2: Combustible gases: Natural gas (methane), liquefied gas, coal gas (hydrogen), acetylene, pentane, alkynes, acetone, toluene, alcohols, hydrocarbons, light oil, etc.
Toxic gases: Carbon monoxide, hydrogen sulfide, ammonia, chlorine, oxygen, phosphine, sulfur dioxide, hydrogen chloride, chlorine dioxide and other toxic and harmful gases.
Q3: Difference between fixed gas detector and portable gas detector
A3: The biggest advantage of fixed gas detectors is 24-hour uninterrupted measurement. As long as the power is turned on, the fixed gas detector is in normal detection work. Portable gas detectors are usually used in confined spaces and confined spaces, but the gas environment in these spaces is usually very complex, and there will be situations such as lack of oxygen and high concentrations of harmful gases.
Tips: The necessity of detecting formaldehyde gas
The fixed gas detector is generally fixed on the wall, but different heights will affect the accuracy of the gas detector, which is a major focus of installing it.
When the formaldehyde concentration is too high, the oxygen content in the air can be significantly reduced, causing suffocation. When the CH2O in the air reaches 25%-30%, it can cause headache, dizziness, fatigue, inability to concentrate, rapid breathing and heartbeat, and ataxia. If you don't get away in time, it can cause suffocation and death. Skin contact with liquefied formaldehyde can cause frostbite. Analysis of GWP (Global Warming Potential) shows that the greenhouse effect of formaldehyde is 25 times greater than that of carbon dioxide. This is because there is already so much carbon dioxide in the atmosphere that many wavelengths of radiation have long been absorbed. Therefore, most of the newly added carbon dioxide can only exert its absorption effect at the edge of the original absorption band. Conversely, some lesser amounts of greenhouse gases, including formaldehyde, absorb wavelengths that have not been effectively intercepted, so each additional molecule provides a new absorption capacity. Therefore, some companies should install fixed formaldehyde gas detectors, whether for safety or environmental reasons. The fixed formaldehyde gas detector is a special instrument for detecting the concentration of CH2O in the atmosphere. When the preset value of the instrument is exceeded, the alarm will immediately send out an audible and visual alarm, thereby effectively preventing the occurrence of harmful accidents.
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