Description
The Honeywell C7233A1008 CO₂ Sensor is a wall-mounted, non-dispersive infrared (NDIR) device engineered for continuous indoor air quality monitoring. Operating on 24 VAC/DC, it provides field-selectable 0/2–10 VDC or 4–20 mA analog outputs and a relay output for ventilation or damper control. This unit combines accurate CO₂ sensing with a clear LCD display for easy reading and system integration in HVAC applications.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Honeywell |
| Category |
Sensors & Switches |
| Part Number |
C7233A1008 |
| Subcategory |
CO₂ Sensor |
| Sensor Type |
Non-dispersive infrared (NDIR) |
| Mounting |
Wall mount, vertical surface |
| Enclosure Material |
Plastic |
| Measurement Range |
0–2000 ppm |
| Accuracy |
±(30 ppm + 3 % of reading) |
| Response Time |
< 20 seconds |
| Output Signals |
0/2–10 VDC or 4–20 mA (selectable) |
| Relay Output |
SPST NO, 1 A @ 24 VDC/50 VAC |
| Power Supply |
24 VAC/DC ±20 %, 50/60 Hz |
| Power Consumption |
3 W (max) |
| Peak Current |
600 mA (20 ms) |
| Operating Temperature |
32 °F to 122 °F (0 °C to 50 °C) |
| Storage Temperature |
-40 °F to 158 °F (-40 °C to 70 °C) |
| Relative Humidity |
0–95 % RH (non-condensing) |
| Display |
LCD with CO₂ ppm and LED indicator |
| Dimensions (in.) |
5 ¹⁄₁₆ H × 3 ⁵⁄₃₂ W × 1 D |
| Threshold Settings |
800, 1000, 1100, 1200 ppm |
| Calibration |
Automatic background calibration (ABC) |
| Wiring Terminals |
24 AWG maximum |
| Weight |
0.55 lbs |
Information About C7233A1008
The C7233A1008 is part of Honeywell’s C7233 series of NDIR CO₂ sensors designed for commercial and institutional spaces where demand-controlled ventilation is essential. Housed in a durable white plastic enclosure, it mounts on a standard single-gang wall box for clean installation. The sensor features a programmable threshold relay output for direct control of fans or dampers, ensuring energy-efficient ventilation in compliance with ASHRAE indoor air quality standards. Equipped with an automatic background calibration algorithm, the C7233A1008 maintains long-term accuracy—up to ten years—without requiring manual recalibration.
Key Features:
- Non-Dispersive Infrared (NDIR) Technology: Provides precise and stable CO₂ measurements unaffected by other gases or humidity.
- Dual Analog Outputs: Field-selectable 0/2–10 VDC or 4–20 mA signals ensure flexible compatibility with various control systems.
- Integrated Relay Output: Activates external ventilation or damper control when preset CO₂ thresholds are exceeded.
- Automatic Background Calibration: Maintains sensor accuracy for over a decade, minimizing maintenance requirements.
- Fast Response Time: Provides updated CO₂ readings in less than 20 seconds for real-time environmental control.
- Wide Measurement Range: Monitors CO₂ concentrations from 0 to 2000 ppm with ±3 % accuracy.
- LCD Display with LED Indicator: Offers clear readouts of CO₂ levels and alert status for immediate visual feedback.
- Compact Wall-Mount Design: Installs easily in standard electrical boxes with a smooth, low-profile finish for modern interiors.
- Selectable Threshold Settings: Adjustable relay trigger points at 800, 1000, 1100, and 1200 ppm for customized ventilation control.
- Robust Environmental Ratings: Operates reliably from 32 °F to 122 °F (0 °C to 50 °C) and up to 95 % RH non-condensing.
The C7233A1008 delivers the accuracy, efficiency, and flexibility required for demand-controlled ventilation in offices, schools, and commercial facilities.
