Description
Fixed gas detector for sale, used to detect and monitor formaldehyde concentration. Measuring range 0 to 10/20/50/100 ppm, remote control with optional output signal 4-20mA & RS485. The CH2O gas detector has functions of sound & light alarm, real time display and 24 hours online work.
Features
- Formaldehyde gas detector adopts high precision sensor for accurate gas leak detection.
- Formaldehyde gas detector is equipped with 3-wire system 4-20mA analog output, relay output, RS485 output (optional).
- The CH2O gas detector is compatible with various controlled alarms, PLC, DCS and other control system, and can be remote monitored.
- Explosion-proof design, fast, relaible and stable.
- Infrared ray controller can remote control the alarm point settings, zero calibration, and address modification.
- Two-stage alarm with sound and light, and the alarm point is settable.
- The formaldehyde gas detector has self-calibration function, and three standard keys will be used to realize on-site maintenance.
- The CH2O gas detector can output one or two on-off signals, can drive ventilator, solenoid valve or other external devices.
Specification
| Model | GD300-CH2O |
| Detection Principle | Electrochemistry |
| Gas | Formaldehyde (CH2O) |
| Range (Optional) | 0 to 10ppm, 0 to 20ppm, 0 to 50ppm, 0 to 100ppm, 0 to 500ppm, 0 to 1000ppm |
| Resolution | 0.01ppm (0-10/20/50ppm), 0.1ppm (0-100ppm), or 1ppm (0-500/1000ppm) |
| Calibration Kit | Gas pressure regulator (calibration gas cylinder NOT included) |
| Accuracy | ≤±3% F.S. |
| Response Time | ≤10s |
| Repeatability | ≤±1% |
| Recovery Time | ≤10s |
| Linearity Error | ≤±1% |
| Zero Shift | ≤±1% (F.S./year) |
| Signal Output (Optional) | 4-20mA and RS485 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 | II 2G Ex ia IIC T4 Ga |
| Protection Grade | IP65 |
| Certification | CE, ATEX (Standard: EN IEC 60079-0:2018, EN 60079-1:2014) |
| 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 |
| Power Adapter | Input 100-240VAC 50/60Hz, Output 24VDC 1A (Optional USA plug, Europe plug, AU plug or UK plug) |
| Accessories (Optional) | Calibration kit – gas pressure regulator (calibration gas cylinder NOT included)
|
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)
***Other Common Gases and Ranges Available for Fixed Gas Detectors
| Gas Type | Measure Range | Resolution |
| Ammonia (NH3) | 0-50/100/200/500/1000/2000/5000ppm | 0.01ppm/0.1ppm/1ppm |
| Benzene (C6H6) | 0-1/10/50/100/200/1000/2000/5000/10000ppm | 0.001ppm/0.01ppm/0.1ppm/1ppm |
| Carbon Dioxide (CO2) | 0-1000/2000/5000/9999ppm, 0-2/5/10/20/25/30/50/100%VOL | 0.1ppm/1ppm/0.001%VOL/0.01%VOL/0.1%VOL |
| Carbon Monoxide (CO) | 0-10/20/50/100/500/1000/2000ppm | 0.01ppm/0.1ppm/1ppm |
| Chlorine (Cl2) | 0-5/10/20/50/100ppm | 0.001ppm/0.01ppm/0.1ppm |
| Chlorine Dioxide (ClO2) | 0-1/5/10/20/50/100ppm | 0.001ppm/0.01ppm/0.1ppm |
| Combustible Gas (EX) | 0-100%LEL | 1%LEL |
| Ethylene (C2H4) | 0-10/20/50/100/500/1000/2000ppm | 0.01ppm/0.1ppm/1ppm |
| Formaldehyde (CH2O) | 0-10/20/50/100/500/1000ppm | 0.01ppm/0.1ppm/1ppm |
| Hydrocarbons (HC) | 0-100%LEL | 1%LEL |
| Hydrogen (H2) | 0-10/20/500/1000/2000/5000/9999ppm, 0-2/4% VOL, 0-100% LEL | 0.1ppm/1ppm/0.001%VOL/1%LEL |
| Hydrogen Chloride (HCL) | 0-10/20/50/100/200ppm | 0.01ppm/0.1ppm |
| Hydrogen Cyanide (HCN) | 0-10/20/50/100ppm | 0.01ppm/0.1ppm |
| Hydrogen Sulfide (H2S) | 0-5/20/50/100/200ppm | 0.001ppm/0.01ppm/0.1ppm |
| Methane (CH4) | 0-50/100%VOL, 0-100%LEL | 0.01%VOL/0.1%VOL/1%LEL |
| Nitric Oxide (NO) | 0-1/5/10/20/50/100/250/500/1000ppm | 0.001ppm/0.01ppm/0.1ppm/1ppm |
| Nitrogen (N2) | 0-99.99/0-100%VOL | 0.01%VOL/0.1%VOL |
| Nitrogen Dioxide (NO2) | 0-1/5/10/20/50/100/500/1000ppm | 0.001ppm/0.01ppm/0.1ppm/1ppm |
| Nitrogen Oxides (NOX) | 0-1/5/10/20/50/100/250/500/1000ppm | 0.001ppm/0.01ppm/0.1ppm/1ppm |
| Oxygen (O2) | 0-25/30/100%VOL | 0.01%VOL/0.1%VOL |
| Ozone (O3) | 0-1/5/10/20/50/100ppm | 0.001ppm/0.01ppm/0.1ppm |
| Phosphine (PH3) | 0-10/20/50/100/500/1000/2000/3000ppm | 0.01ppm/0.1ppm/1ppm |
| Sulfur Dioxide (SO2) | 0-1/5/10/20/50/100/500/1000ppm | 0.001ppm/0.01ppm/0.1ppm/1ppm |
| Volatile Organic Compounds (VOC) | 0-1/5/10/20/50/100/200/500/1000/2000/5000/10000ppm | 0.001ppm/0.01ppm/0.1ppm/1ppm |
Note: Some common gases and the measuring ranges are listed in the above table. For more information, please feel free to contact us.
Details
Tips: Electrochemistry principle of the formaldehyde gas detector
Formaldehyde gas detector consists of a plug-in electrochemical sensor, an intelligent transmission module and a sensor splash cover. Working mode of the electrochemistry sensor is to detect a certain amount of gas diffusion. Oxygen first passes through a sintered stainless steel filter, and then enters the sensor through the gas permeable membrane on the sensor. Between the electrode of the sensor and the electrolyte, oxygen is consumed and a corresponding current is generated between the anode and the cathode. When current flows in the sensor, the lead positive electrode is oxidized to lead oxide. Intensity of the output current and the concentration of oxygen have an absolute linear function relationship. The rapid response capability of electrochemistry sensor enables the formaldehyde gas detector to continuously monitor the concentration of formaldehyde.
Reviews
There are no reviews yet.