The ammonia(NH₃) gas monitoring and alarm system produced by CMC company consists of a gas detector and controller:
| Device Type | Main Functions |
| Ammonia(NH₃) gas detector | – Real-time monitoring of ammonia concentration in the air
-Equipped with electrochemical/infrared/catalytic sensors – Outputs signals to the controller (4-20mA, RS485, relay, etc.) – Some models have built-in sound and light alarms – Installed on-site (cold storage, chemical workshop, tank area) |
| Ammonia(NH₃) gas controller | – Centralized reception and display of signals from multiple detectors
– Triggers sound and light alarms when concentration exceeds the limit, can link to fans, shut-off valves, etc. – Supports multiple inputs (2, 4, 8 channels or more) – Records historical data and alarm logs – Supports remote communication and networking – Installed in monitoring rooms or control centers |
Fixed ammonia alarm technical table:
| Parameter | Technical Specification |
| Gas Detected | Ammonia (NH₃) |
| Detection Principle | Electrochemical / Semiconductor (model dependent) |
| Measurement Range | 0–100 ppm / 0–500 ppm (optional) |
| Resolution | 1 ppm |
| Accuracy | ±2% F.S. |
| Response Time | ≤30 sec (T90) |
| Alarm Set Point | Adjustable, default 25 ppm / 50 ppm |
| Alarm Type | Audible & visual alarm, relay output, remote signal output |
| Alarm Output | Relay NO/NC |
| Communication Interface | RS485 Modbus RTU (optional) |
| Power Supply | 24V DC ±10% or 220V AC ±10% (optional) |
| Power Consumption | ≤3W |
| Operating Temperature | -20℃ ~ +50℃ |
| Operating Humidity | 10%~95% RH (non-condensing) |
| Protection Level | IP66 |
| Installation | Wall-mounted / Duct-mounted / Hanging |
| Enclosure Material | Aluminum alloy |
Industrial Ammonia Gas Detector Features:
Real-time monitoring of ammonia concentration
High sensitivity and stability
Audio-visual alarm
Supports networking and linkage with exhaust systems
Easy installation and maintenance
In addition to detecting ammonia (NH₃), CMC intelligent gas alarm devices can also detect a variety of toxic gases, such as carbon monoxide (CO), sulfur dioxide (SO₂), chlorine (Cl₂), hydrogen sulfide (H₂S), as well as combustible gases such as methane (CH₄), propane (C₃H₈), butane (C₄H₁₀), and hydrogen (H₂). Some models can also simultaneously monitor oxygen (O₂) concentration or volatile organic compounds (VOCs) to ensure industrial and production safety.
