Description
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.
Features
Superior Electrochemical Sensor
4-20 mA Output
Alarm Relay with Selectable Trip Level
Easy to Field Calibrate
Compact, IP65 (NEMA 4X) Enclosure
Specifications
- 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 ˚C (-4 - 122 ˚F)
- 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)