The Greystone CMD5B4000 is a wall-mounted carbon monoxide (CO) detector designed for commercial and industrial indoor air quality monitoring. It uses an electrochemical sensor and offers flexible output options for integration with building automation systems.

Key Specifications

• Model: CMD5B4000
• Sensor Type: Electrochemical CO sensor
• Measurement Range: 0–500 ppm CO
• Accuracy: ±5% of full scale
• Response Time: <2 minutes for 90% step change
• Sensor Life Span: Typically 5 years

Electrical & Output

• Power Supply: 20–28 VAC or 15–35 VDC
• Analog Output: Field-selectable 4–20 mA or voltage (0–5 VDC or 0–10 VDC)
• Optional Communication: RS-485 (Modbus or BACnet)
• Alarm Options: No relay (CMD5B4000 variant); other models may include one or two alarm relays
• Display: LCD for real-time CO readings and status indicators