RD

Fixed commercial gas detectors monitoring hydrogen (H2), carbon monoxide (CO) and/or nitrogen dioxide (NO2) for controlling Car Park Ventilation Systems in conjunction with the CH-S or CH-M Control Hubs.

UL 2075 Certified

CO and NO2 sensors are UL 2075 certified, ensuring that gas and vapor detectors are reliable, accurate, and can detect the presence of harmful gases in a timely manner.

Single or Dual Sensor Configurations

Capable of housing one or two sensors offering flexibility, allowing precise monitoring of a specific gas with one sensor or simultaneous detection of two gases with enhanced safety and efficiency.

Excellent Coverage

Monitors a sizable area, up to 7,500 sq. ft., providing extensive coverage for enhanced safety and early detection of hazardous gases.

Seamless Expansion

Offers the flexibility to connect up to 4 sensors per CH-S Control Hub and 30 sensors per CH-M Control Hub. Add sensors at any time, allowing for easy scalability as monitoring needs evolve.

Simplified Installation

Streamlines the installation process with daisy chain power and communication, along with factory calibration and customized programming, reducing setup time and complexity.

Enhanced Durability

Provides resilience against weather elements with rainproof water resistance and offers straightforward service and maintenance procedures, ensuring long-term reliability.

Technical Specifications

	RD Series Remote Detectors
Input power (Single sensor)	24 VAC, 50/60 Hz. 0.2A to 0.35A
Power consumption (Single sensor)	4.8 VA
Power consumption (Dual sensor)	8.5 VA
Analog output	User-selectable 4-20 mA, 0.2-1 VDC, 1-5 VDC, or 2-10 VDC with zero offset enable/disable
Digital communication	Modbus RTU
Storage temperature	-58°F to 248°F (-50°C to 120°C)
Humidity	15% to 90% (non-condensing)
Front panel indicators	2 LEDs, Power (green), Fault (yellow)
Dimensions	4.98” W x 4.98” H x 2.18” D (12.6 cm W x 12.6 cm H x 5.5 cm D)
Weight	1 lb (0.5 kg)
Housing	Gray, NEMA 3R, polycarbonate plastic
Performance (CO/NO2 only)	ANSI/ISA 92.00.01-2010 (R2015)
Electromagnetic interference	EN 50270, FCC Part 15 Subpart B
Environmental	RoHS

Sensor Performance

	CO	NO2	H2
Model (Item #)	RD-CO (#494104)	RD-NO2 (#494105)	RD-H2 (#494130)
Performance range	0-200 PPM	0-10.0 PPM	0-100% LEL
Performance resolution	1 PPM	0.1 PPM	1% LEL
Calibration point	100 PPM	5.0 PPM	50% LEL
Maximum overload	2,000 PPM	200 PPM	n/a
T90 response time	< 30 seconds	< 50 seconds	< 20 seconds
Coverage radius	50 ft.	50 ft.	40 ft.
Coverage area	7,500 sq. ft.	7,500 sq. ft.	5,000 sq. ft.
Sensor type	Electromechanical	Electromechanical	Catalytic bead
Long term output drift	< 5% per year	< 2% per year	< 5% per year
Expected sensor life	> 7 Years	> 5 Years	2 Years
Calibration duration	2 Years	1 Year	n/a
Note: RD-Dual (#494106) combines a CO and NO2 sensors into one remote detector.