Cost-effective hydrocyanic acid (HCN) gas monitor with a wide range of detection, 0 to 10/20/50/100 ppm multi-speed detection range, able to accurately monitor harmful gases in the environment. The compact design makes it easy to carry and suitable for many occasions. Optional 4-20mA and RS485 signals are available, as well as relay output function. With the purchase of this hydrogen cyanide detector, you get a professional gas detection tool at a great price, ensuring a safe working environment.
Specification
| Model |
GD300-HCN |
| Detection Principle |
Electrochemistry |
| Detected Gas |
Hydrogen Cyanide (HCN) |
| Measure Range |
0-10ppm, 0-20ppm, 0-50ppm, 0-100ppm |
| Resolution |
0.01ppm (0-10/20/50ppm), 0.1ppm (0-100ppm) |
| Calibration Kit |
Gas pressure regulator (calibration gas cylinder NOT included) |
| Install Method |
Wall-mounted, piping type, flow-type (according to the detected environment) |
| Output Signal (Optional) |
4-20mA and RS485 Relay output: one group of relay output (1NO+1NC, 5A/30V) for one alarm (default), or two groups of relay output (2NO+2NC, 5A/30V) for high/low alarm (optional). |
| Precision |
≤±3%F.S. |
| Response Time |
≤10s |
| Repeatability |
≤±1% |
| Recovery Time |
≤10s |
| Linearity Error |
≤±1% |
| Zero Shift |
≤±1%(F.S./year) |
| Display |
High light nixie tube display |
| Power Connection Type |
Power connection type: G1/2 male thread explosion-proof flexible pipe Pipe-mounted type: M45*P2.0 |
| Temperature |
-20℃ ~ 50℃ |
| Humidity |
0-95%RH (non-condensing) |
| Operating Time |
24h |
| Explosion-Proof |
II 2G Ex db IIC T4 Gb |
| Degree of Protection |
IP65 |
| Alarm Mode |
Sound, light |
| Case Material |
Die-casting aluminum housing |
| Power |
12-36V DC |
| Dimensions |
206*179*90mm |
| Weight |
≤1.6kg |
| Approval |
CE, ATEX (Standard: EN IEC 60079-0:2018, EN 60079-1:2014) |
| Power Adapter |
Input 100-240VAC 50/60Hz, Output 24VDC 1A (Optional USA plug, Europe plug, AU plug or UK plug) |
Fixed Gas Monitor User Manual
Gas Monitor Functions
- This hydrogen sulfide gas detector adopts three-wire 4-20mA analog signal output, relay output, RS485 output (optional).
- The original imported sensors, with a unique infrared remote control function, non-contact operation and maintenance of hydrogen gas tester.
- Compatible with a variety of control alarms, PLC, DCS and other control systems, you can realize remote monitoring, gas monitoring is more accurate and reliable.
- Explosion-proof design, fast, credible and more stable.
- Full software auto-calibration function with temperature compensation can perfectly realize the compensation of gas concentration under different temperature environment.
Fixed HCN Gas Monitor Details

Fixed Hydrogen Cyanide Gas Monitor with Alarm Dimension (Unit: mm)

Tips: What is hydrogen cyanide?
Hydrogen cyanide (HCN) is a colorless, toxic chemical, usually in the form of a gas with a bitter almond odor. It is used in a wide range of industrial applications, such as in the manufacture of plastics, fertilizers and chemicals. At the same time, hydrogen cyanide is a highly hazardous substance, fatally toxic to humans and animals in high concentrations, and is often used in pesticides or chemical weapons. Because of its hazardous nature, the production, storage and transportation of hydrogen cyanide are subject to strict regulations and safety controls.