Aci CO-R-RB-D Carbon Monoxide Sensor Room Mount 4-20ma

Product Description

The ACI CO-R-RB-D is a room-mount carbon monoxide sensor designed for continuous CO monitoring in occupied and industrial spaces. It outputs a 4-20mA current signal and a 2-10VDC voltage signal simultaneously, giving building automation and control systems direct analog readings without additional signal conversion. The default measurement range is 0-125 PPM, with a maximum ceiling of 250 PPM, and the onboard LCD displays live CO concentration for field verification. An integrated relay and audible buzzer provide local alarm output when CO levels exceed set thresholds. Licensed HVAC technicians, building automation contractors, and industrial safety professionals are the primary installers.

This sensor is suited for room-level CO detection across a wide range of applications including industrial facilities, oil and gas environments, laboratories, agricultural buildings, transportation hubs, and mining operations. The room-mount form factor positions the sensor at occupant-breathing height for accurate zone-level readings. The dual analog outputs make it compatible with most DDC controllers and building management systems that accept standard 4-20mA or 2-10VDC inputs, allowing integration into existing control sequences for ventilation response or alarm annunciation.

Key Features

• Default range of 0-125 PPM with a maximum measurable range up to 250 PPM for flexible threshold configuration
• Simultaneous 4-20mA and 2-10VDC analog outputs for direct BAS or DDC controller integration
• Onboard LCD displays real-time CO concentration for on-site verification without test equipment
• Integrated relay and audible buzzer enable local alarm response independent of the control system
• Room-mount enclosure designed for wall installation at occupant level
• Broad application suitability covering industrial, agricultural, laboratory, and transportation environments

Compatibility

Designed for use with building automation systems and DDC controllers that accept standard 4-20mA current or 2-10VDC voltage analog inputs. Suitable for industrial, oil and gas, laboratory, agricultural, transportation, and mining applications as noted by the manufacturer.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified building automation contractor familiar with low-voltage wiring and local codes. De-energize the control panel and verify zero voltage at the terminal block before wiring the sensor outputs. Follow the sensor mounting height recommendations for the target application to ensure accurate zone-level readings. Verify output signal type selection and scaling at the controller before commissioning.

Technical Specifications

• Default Measurement Range: 0-125 PPM
• Maximum Measurement Range: 250 PPM
• Full Sensor Range: 0-2000 PPM
• Output Signal: 4-20mA and 2-10VDC
• Output Type: Current and Voltage (simultaneous)
• Display: LCD
• Local Alarm: Relay and audible buzzer
• Mount Type: Room mount
• Application: Industrial, oil and gas, laboratories, agriculture, transportation, mining

Standard Information

• Brand: ACI
• Manufacturer Part Number: CO-R-RB-D