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NH3 Responder
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NH3 Responder

Order Number: NH3-Responder
This product is discontinued. See NH3-Responder-Ultra for latest model.


  • Uses both PID (0-1000ppm NH3) and LEL (0-100% LEL) sensors.
  • Smaller and lighter than competitive instruments.
  • Water-resistant design in an integral concussion-proof enclosure.
  • Large LCD allows for easy-to-read monitoring.
  • Integral motorized pump for remote sampling and fast response.
  • AA battery powered (rechargeable battery pack optional).
  • 95 dB alarm tone, bright LED alarm bars, & internal vibrating alarm for noisy areas.
  • Auto backlight: activates in low light & when in alarm.
  • Four alarm levels: instantaneous Low Alarm, High Alarm, TWA and STEL.
  • Records TWA, STEL, and max exposures to gas & displays readings on command.
  • Datalogger with programmable sampling intervals.
  • Carrying case, and Norprene tubing hose included. 



5.7 x 2.9 x 1.5 in. / 14.5 x 7.4 x 3.8 cm


13.1 oz. / 370 g


- Visual, vibrating, audible (95dB)
- Low, High, STEL, TWA, OL (over limit)


Sensor integrity, circuitry, battery and audible/visual alarms on activation, battery (continuous)


Integral motorized pump for remote sampling and fast response

User options

Confidence beep, Set STEL interval, set TWA method, Sensor on/off, Latching alarms, Safe display mode, Stealth mode, Set datalogger rate, Passcode protection,  Set Datalogger  Rate, Fast Pump, Automatic backlight, User-settable calibration gas level, Calibration due lockout, Language choices (5), Adjust clock

Detection Range
PID sensor: 0-1000ppm NH3 (1.0ppm increments)
LEL sensor: 0-100% LEL (1% LEL increments)
Warranty 1 year including sensors
Please review these other products:

NH3 Responder replacement sensors

Order Number:
Replacement sensors for the NH3 Responder (choose from list)