NDD5B Nitrogen Dioxide Detector and Transmitter

The NDD5B nitrogen dioxide detector uses a superior electrochemical sensor for reliability and accuracy in the most critical applications.  The NDD5B provides a 3-wire sourcing 4-20 mA output as well as an alarm relay with three jumper selectable trip level settings. 

Superior Electrochemical Sensor
4-20 mA Output
Alarm Relay with Selectable Trip Level
Easy to Field Calibrate
Compact, IP65 (NEMA 4X) Enclosure

• Sensor Type.....................................Electrochemical
• Sample Method.............................Diffusion
• Measurement Range....................0-10 PPM   
• Accuracy...........................................±0.2 PPM or 5% of reading  (whichever is greater)
• Life Expectancy..............................>2 years
• Typical Coverage Area.................700 m2 (7500 ft2) or 15 m (50 ft) radius
• Operating Temperature..............-20 - 50 ËšC (-4 - 122 ËšF) 
• Operating Humidity.....................15 - 90% RH (0 - 99% intermittent)
• Pressure.............................................Atmospheric ±10%
• Power Supply..................................24 Vdc ±20% (non-isolated half-wave rectifed)  or 24 Vac ±10%
• Consumption..................................50 mA max. 
• Output Signal..................................4-20 mA sourcing
• Output Drive at Capability.........550 ohms max. @ 24 Vac/Vdc
• Relay Output...................................SPDT, Form C contact (N.O. and N.C.)
  5 amps @ 30 Vdc, p.f. = 1
  Trip Point: Low = 1, Mid = 3,  High = 5 PPM,               
  Hysteresis - 3%
• Wiring Connections......................Screw terminal block (14 to 22 AWG)
• External Dimensions....................71 x 104 x 48  mm  (2.8” w x 4.1“ h x 1.9” d)
• Enclosure Ratings..........................ABS - UL94-5VB - IP65 (NEMA 4X)
• Field Calibration.............................By applying calibration gas standards   (calibration kit available)

NDD5B Nitrogen Dioxide Sensor Datasheet