NO2 Sensor
ACI | Part Number: B5NO210POX
B5-NO2-10P-O-X is a BACnet MS/TP Nitrogen Dioxide gas detector.
Ships in 4-6 weeks
These units are housed in a NEMA 4X rated plastic enclosure that will meet the most stringent applications. All models feature an internal clock, LCD Display for displaying gas concentrations and setup, LED Status Indication, integral buzzer with three user configurable relays and a number of different communication protocols for use with one of our gas controllers or your building management system.

B5-NO2-10P-O-X Technical Data

Supply Voltage VDC
24 VDC nominal (+18 to 30 VDC) (Q5: AC Power must not be grounded)

Supply Voltage VAC
24 VAC nominal (+15 to 24 VAC, AC Power must not be grounded)

Fuse Protection
0.750A Polyswitch; (Resets after fault is cleared & power to circuit is removed)

Supply Current and Power Consumption
0.3A maximum, 8.4 VA

Maximum Load Impedance
4-20 mA Output: 600 Ohms maximum

Communication Protocols
RS-485 Serial BACnet MS/TP (Master and Slave; Default: Master)

Communication Baud Rates
9600, 19200, 38400, 76800 Bits/Second (Default: 38400)

Factory Calibration Range
See Gas Sensor Selection & Specification Table on back of data sheet

LCD Graphic Display with backlight (Displays: TWA, STEL and Concentration)

Three Capacitive Touch sensing keys

Relays, Contact Type and Relay Contact Ratings
Three, SPDT (Form C) Dry Contacts and 1.0A max. @ 30 VDC or 0.3A max. @ 125 VAC (Resistive Loads)

Relay Life Expectancy
Mechanical: 50,000,000 operations minimum @ 36,000 operations/hour
Electrical: 200,000 operations minimum @ rated load

Status LEDs
Two Green LEDs (Tx/Rx Communication Status); Three Red LEDs (Relays 1, 2, & 3)

80 dB at 3.94" (10 cm), 2700 Hz (3 Programmable Tones)

Sensor Warm Up Time
24 Hours (Allow 24 hours before calibrating sensor after installation)

Sensor Type
See Sensor Technology Type in Table on back of Product Data Sheet

Sensor Gas Types
Combustible, Toxic Gases/Oxygen Sensor & Infrared

Coverage Area and Mounting Height
See Gas Sensor Selection & Specification Table on back of data sheet

Sensor Life Expectancy
Toxic/Electrochemical Sensors: 2 to 3 Years, typical
Oxygen/Hydrogen Sensors: 18 months, typical
Combustible/Catalytic: 3 to 5 years, typical
CO 7 years, typical

Unit Shelf Life
Electrochemical (Toxic) Sensors: 6 months from date of purchase
Catalytic (Combustible) Sensors: 1 year from date of purchase

Replacement Sensor Modules
See additional on-line Product Literature or Contact ACI

Recommended Maintenance
Combustible Sensors: Accuracy & Bump test every 3 months or as required by Code
Toxic Sensors: Accuracy & Bump test every 6 months or as required by Code

Enclosure Specifications (Material Type, Flammability, NEMA/IP Rating
Plastic Enclosure; Polycarbonate Lexan; UL94 V-0, NEMA 4, 4X, 12 and 13 (IP66)

Enclosure Knockouts
3/4" Knockouts (accepts 1/2" Conduit Fittings)

Operating Temperature and Humidity
See Sensor Selection & Specification Table on back of data sheet
5 to 95% RH, non-condensing

Operating Atmospheric Pressure
14.696 psi (1.0132 bar) +/- 10%

Recommended Storage Temperature/Humidity
32 to 68F (0 to 20C)
5 to 95% RH, Non-Condensing

Wiring Connections and Wire Size
De-pluggable Screw Terminal Blocks
16 to 24 AWG (0.2047 to 1.301 mm) Shielded Twisted Pair

Communications Cable
Belden 9841 or Equivalent, 120 Ohms Input Impedance

Terminal Block Torque Rating
0.37 ft-lb (0.502 Nm) Nominal