Ammonia Detectors

R.M. Technologies of America provides reliable ammonia leak detection systems designed to keep industrial facilities safe and compliant. Our multi-channel gas monitors and specialized sensors ensure early detection and rapid response to ammonia and other gas leaks.

Ammonia Leak Detection System

Our multi-channel gas monitor can be configured with electrochemical sensors to detect up to 10 channels. Built-in delay timers manage both high and low alarms, providing safe, reliable monitoring for ammonia and other gases in diverse industrial environments.

Choosing the Right Sensor

Selecting the correct sensor for your application is critical. R.M. Technologies of America offers multiple sensor technologies to meet specific detection needs:

Solid-State Sensors

  • Highly reliable, long-life, and cost-effective

  • Sensitive to a broad spectrum of gases (ppm to percentage range)

  • Available for ammonia, carbon monoxide, hydrogen, R-22, R-134a, methane, propane, and more

Semiconductor Sensors

  • Enhanced solid-state technology

  • Detects ammonia at levels as low as 50 ppm

  • Ideal for well-ventilated engine rooms and outdoor applications

Electrochemical Sensors

  • Provides gas-specific monitoring with high accuracy

  • Excellent zero and calibration stability over long periods

  • Reduces false alarms in harsh industrial environments

Infrared Sensors

  • Rugged, pump-free, filter-free, and maintenance-free

  • Selective, stable, and durable over many years

  • Delivers analyzer-level specificity in a simple design

Important Note

These sensor guidelines provide basic information for sensor selection but do not replace full system specification requirements. For accurate sensor selection and system design, contact our applications engineers.

Reliable Gas Detection

Advanced ammonia detection systems monitor your facility for leaks, ensuring safety and minimizing risk of exposure.

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Ammonia Refrigeration System

Ammonia Detectors

Ammonia detectors serve as the primary electronic safeguard for industrial facilities, providing continuous monitoring to alert personnel of leaks well before they reach hazardous concentrations. These systems typically utilize electrochemical sensors for high-sensitivity detection at low parts-per-million (ppm) levels or solid-state (metal oxide) sensors for ruggedness in harsh environments. At RM Technologies, we integrate these detectors into comprehensive safety networks, strategically placing them at high-risk points such as pump skids, tank valves, and loading racks. Our systems are engineered to trigger multi-stage responses—ranging from local visual and audible alarms to the automated activation of dilution fans and the closure of Emergency Shutdown (ESD) valves—ensuring that a localized leak does not escalate into a facility-wide event. By utilizing NEMA 4X-rated enclosures and heated sensor heads, we ensure that our detection arrays remain reliable even in the corrosive and moisture-heavy atmospheres common to industrial ammonia service.

Proper sensor placement and a rigorous calibration schedule are the difference between a functional safety system and a false sense of security. Because ammonia gas is lighter than air (with a vapor density of approximately 0.6 relative to air), its behavior is dictated heavily by temperature, humidity, and airflow.

Technical Guide: Ammonia Detector Placement & Calibration

  1. Strategic Sensor Placement

For effective leak detection, sensors must be placed where ammonia is most likely to accumulate or pass through on its way to personnel.

  • Height Considerations: Since pure ammonia vapor rises, sensors should generally be placed 12 to 18 inches above the potential leak source or at the highest point in a confined space.
  • The "Cold Ammonia" Exception: If a high-pressure anhydrous line ruptures, the escaping gas undergoes rapid expansion and cooling. This "cold" ammonia can temporarily become heavier than air, hugging the ground. In these high-risk areas, we recommend dual-height sensing (one low, one high).
  • Critical Locations:
    • Loading Racks: Within 5 feet of the transfer manifold.
    • Pump Skids: Directly above the mechanical seals or mag-drive housing.
    • Tank Relief Valves: Near the discharge point (ensuring the sensor is not directly in the high-pressure path).
    • Air Intakes: Near HVAC or ventilation intakes to prevent drawing gas into occupied office spaces.
  1. Choosing the Right Sensor Technology
  2. The Calibration & Bump Test Schedule

Sensors "drift" over time due to environmental exposure. A "dead" sensor looks exactly like a "safe" sensor without testing.

  • Bump Testing (Monthly): A brief exposure to a known concentration of ammonia gas to verify the sensor reacts and the alarms trigger. This is a functional check, not a calibration.
  • Full Calibration (Quarterly/Bi-Annually): Adjusting the sensor's internal settings to match a certified span gas. This ensures that when the display reads "25 ppm," it is actually 25 ppm.
  • Sensor End-of-Life: Electrochemical cells are "consumable." If a sensor fails to respond to span gas during calibration, the cell must be replaced immediately.

RM Technologies: Safety System Integration

We don't just sell detectors; we engineer Safety Logic. Our systems are programmed with two-stage alarming:

  1. Low Alarm (25 ppm): Triggers local strobes and starts dilution fans.
  2. High Alarm (50 ppm+): Can trigger a site-wide evacuation and activates the Emergency Shutdown (ESD) valves to isolate the ammonia source.

 

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