Achieve UL-62990 CERT with SemeaTech Long-Life NH3-L Sensors

SemeaTech NH3-L series long-life electrochemical ammonia sensors have been receiving consistent, high praise from the market since their official release. Recently, we received positive feedback from a leading global manufacturer of ammonia detection and control equipment for cold storage compressor rooms. This manufacturer, which holds a significant share of the global cold storage compressor room ammonia detection and control equipment market, confirmed that their systems equipped with our flagship product—the NH3-L series long-life electrochemical ammonia sensors—successfully achieved UL-62990 certification, a key standard for toxic gas detectors used in cold storage compressor rooms.
 
The UL-62990 standard was developed by UL (Underwriters Laboratories Inc.), a globally recognized, independent, not-for-profit public safety organization. This standard governs the design, construction, operation, and maintenance of compressor rooms to ensure safety, operational efficiency, and environmental protection.
 
The customer’s chief engineers noted that only SemeaTech’s NH3-L series long-life ammonia sensors successfully passed the rigorous one-year testing process required to achieve UL-62990 certification. Competing sensors from other manufacturers failed to meet the demanding requirements. One of their engineers humorously remarked that their new product line would be “dead on arrival” without SemeaTech sensors.
 
This feedback highlights the outstanding performance of SemeaTech’s NH3-L series electrochemical ammonia sensors. Unlike conventional, depleting ammonia sensors available on the market, the NH3-L series operates on a non-depleting principle, offering a significantly longer operating lifespan and superior sensitivity. These sensors are particularly well-suited for industries such as farming, ammonia refrigeration, and other environments where low concentrations of ammonia need to be monitored over extended periods.
 
Key Features of SemeaTech NH3-L Series Long-Life Electrochemical Ammonia Sensors:
1. Extended lifespan: With a non-depleting design, the sensor maintains performance regardless of a long time exposure to ammonia, offering a warranty of up to two years.
2. Stable performance in extreme temperatures: The sensors deliver minimal sensitivity to environmental temperature, providing stable signal output at -40°C and operating reliably in temperatures ranging from -40°C to 40°C.
3. Unbiased design: Features a simpler application circuit configuration for easier integration.
4. Smart module compatibility: Can be paired with SemeaTech’s Smart Module to enable digital outputs such as I2C and UART for advanced connectivity.

 
As demonstrated by the above sensitivity drift graph for 4NH3-100L, 4NH3-500L and conventional 4NH3-100S  ammonia sensors over a three-year monitoring period, the sensitivity of the NH3-L series remains notably stable, without exhibiting a downward trend. This further substantiates the exceptional performance of the NH3-L series.