Ammonia (NH3) Sensor Calibration: Best Practices

Ammonia detection is common in industrial refrigeration systems, agricultural facilities, and chemical processing — environments where an undetected leak can escalate quickly.

Calibration considerations

Ammonia sensors can be affected by temperature extremes, which matters in refrigeration environments where the detector itself may be operating near the conditions it's designed to catch. Consistent calibration practice — same technician process, same reference concentration, documented each time — helps you tell the difference between a sensor problem and an environmental effect.

Calibration tips

• Calibrate at a concentration relevant to your alarm setpoint rather than a generic reference value.
• If sensors are installed in cold-storage or refrigeration environments, verify the manufacturer's guidance on calibrating in cold conditions — some sensors need to acclimate before an accurate calibration is possible.
• Log every calibration, especially in facilities subject to process safety management requirements.

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