The Optio PGM is a stand-alone gas monitor with two gas sensors designed for low-level detection of vehicle emissions in enclosed spaces. Once alarm thresholds are reached, the monitor can engage mitigation and notification systems; including turning on ventilation, warning signals, and communicating with a facility’s BAS / BMS.
The Optio PGM’s supports both Carbon Monoxide (CO) and Nitrogen Dioxide (NO2) sensors. The NO2 sensor can be deployed internally or remotely, allowing the device to detect toxic gases up to 100 ft from the monitor. The Optio PGM seamlessly integrates into larger safety systems, forming a scalable solution engineered to the unique safety and operational needs of any facility.
Multiple detectors can be installed and easily connected without the need for a central panel/controller by a simple series connection of the detectors. LED indicator lights clearly show the status of the detector, and a large LCD display continually shows the CO & NO2 levels being monitored. In the event of a power loss or malfunction, the Optio PGM activates the ventilation system.
Electricity and heating expenses can be dramatically reduced due to the ventilation fans operating only when needed as opposed to continuously running. Energy savings of up to 85% can be achieved and in most cases, the return on the cost of the system is realized in one year or less!
| On-Demand Ventilation | Operating ventilation only when it is needed reduces equipment wear while also decreasing energy consumption by 85%. |
| Flexible NO2 Sensor Placement | Nitrogen dioxide sensor may be installed internally or remotely up to 100 ft to accommodate site layout needs. |
| Onboard Alarm | Delivers a loud, clear audible warning to alert personnel to hazardous conditions. |
| Optional Dual 4–20 mA Outputs | Offers two analog outputs for integration with building management or automation systems. |
| Dual Onboard Relay Contacts | Provides two built-in relays for direct control of external devices and alarm functions. |
| Self-Diagnostic Function | Continuously monitors internal health to ensure reliable system performance and early fault detection. |
| Multiple I/O Options | Flexible analog, digital, and relay outputs deliver adaptability for any application, whether as a standalone device or integrated into a comprehensive safety system. |
| CO | NO2 | |
|---|---|---|
| Sensor Technology | Electrochemical (EC) | Electrochemical (EC) |
| Range | 0–500 ppm | 0–20 ppm |
| Life Expectancy | 7 years | 2 years |
| Response Time | T90 < 30 seconds | T90 < 25 seconds |
| Electrical | |
|---|---|
| Operating Voltage | 16–24 VAC / 12–24 VDC |
| Power Consumption | 60 mA @ 12 V; 32 mA @ 24 V |
| Mechanical | |
|---|---|
| Enclosure | Polycarbonate |
| Dimensions | 5.11 × 3.93 × 2.75 in (130 × 100 × 70 mm) |
| Weight | 0.60 lb (272 g) |
| Mounting | Various options |
| Environmental | |
|---|---|
| Operating Temperature | -4°F to +122°F (-20°C to +50°C) |
| Operating Humidity | 10-90% RH non-condensing |
| Temperature Compensation | Full temperature range |
| Communication Interfaces | |
|---|---|
| Interface | Modbus RTU (RS485) |
| I/O Capabilities | |
|---|---|
| Relay Outputs | 2 × SPDT dry contact relays, 2 A @ 24 V |
| Analog Outputs (Optional) | 2 × 4–20 mA outputs (one per sensor) |
| Alarms | |
|---|---|
| Onboard Alarm | 83 dBA @ 3 ft (0.9 m) |
| Trouble Alarms | Sensor failure (high / low), communication error, or internal fault |
| Relay Logic | AND/OR logic based on single or multiple sensor inputs |
| Custom Alarms | 4 alarm levels per sensor with hysteresis and hold-to-alarm timing |
| Enclosed Parking Garages |
| Vehicle Maintenance Facilities |
| Service Bays |
| Factories / Warehouses |
| Bus Terminals & Depots |
| Tunnels |
| Car Dealerships |
| Fire / Police Stations |
| UL 61010-1 | |
| UL 2075 | Pending |
| ULC-588 | Pending |
| Buy American Act (BAA) Compliant | Meets federal domestic sourcing requirements for products purchased directly by U.S. government agencies under the Buy American Act. |
| Build America, Buy America Act (BABA) Compliant | Meets domestic content requirements for eligible infrastructure projects funded by the federal government under the Build America, Buy America Act. |
| PVC-C1M0 | PVC Control Panel |
| T1481-M | Horn / Strobe |
| NAP-NO2-KIT | Replacement Sensor NO2 |
| NAP-CO-KIT | Replacement Sensor CO |
| RS-50-24 | Power Supply |
| Industrial IR Remote | IR Remote |
| P1879-CO | Calibration Kit CO |
| P1879-NO2-250 | Calibration Kit NO2 |
| P1879-10 | Calibration Kit |
The Optio PGM specifically monitors carbon monoxide (CO) and nitrogen dioxide (NO2), the two primary toxic gases produced by vehicle exhaust. Carbon monoxide is a colourless, odourless, toxic gas that can cause serious health effects at elevated concentrations. Nitrogen dioxide irritates the respiratory system and can worsen asthma and other respiratory conditions.
The Optio PGM can achieve energy savings of up to 85% by operating ventilation fans only when needed instead of running continuously. The system automatically activates exhaust fans when carbon monoxide (CO) or nitrogen dioxide (NO2) levels reach user-configured thresholds, then returns to standby mode when gas concentrations return to acceptable limits.
Optio PGM has been engineered for parking garages, but is suitable for any application where combustion engines are present. Mechanical rooms, boiler rooms, vehicle maintenance facilities, warehouses, tunnels, car dealerships, fire and police stations, and service bays all benefit from carbon monoxide (CO) or nitrogen dioxide (NO2) gas detection.
The Optio PGM is compliant with California Title 24 requirements, and has UL 61010-1 and UL 2075 approvals (pending).
Installation is designed to be simple and cost-effective. Multiple Optio PGM detectors can be connected without requiring a central panel or controller — they link together through a simple series connection. The system features automatic reset after power loss, self-diagnostic capabilities, and LED indicator lights that clearly show detector status. The nitrogen dioxide (NO2) sensor can be located internally or remotely up to 100 feet away for optimal placement.
Conspec gas detectors use an intuitive 2-step process that includes applying zero gas and span gas (50% of the target gas). In mining applications, this procedure can be performed underground and does not require the gas detector to be brought to the surface. Calibration intervals will depend on the amount / frequency of a given target gas that is present within the environment.
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ACES Monitoring specializes in commercial gas detection systems, including carbon monoxide (CO) and nitrogen dioxide (NO2) monitoring for parking garages, warehouses, and other enclosed facilities. With expertise in system design, installation, calibration, and maintenance, ACES helps customers integrate Conspec Controls’ gas detection solutions with ventilation systems to improve occupant safety, support code compliance, and optimize energy efficiency. ACES is an ideal partner for facility managers seeking comprehensive gas monitoring solutions and ongoing technical support.
C.G. Wood Company is an experienced manufacturer’s representative serving commercial and industrial HVAC markets throughout Maryland, Washington, D.C., and Virginia. Specializing in engineered HVAC solutions, C.G. Wood helps mechanical engineers, contractors, and building owners select equipment for demanding applications. Its partnership with Conspec Controls brings reliable gas detection and monitoring solutions to commercial ventilation, mechanical room safety, and other HVAC applications where performance, regulatory compliance, and occupant protection are essential.
Hawk Equipment Services specializes in gas detection equipment, system installation, calibration, and maintenance for commercial and industrial facilities. With experience in refrigerant leak detection, mechanical room monitoring, and hazardous gas safety systems, Hawk helps customers identify effective solutions for their specific applications. As a Conspec Controls partner, Hawk combines gas detection expertise with hands-on technical services to support HVAC-R safety, reliable system performance, and long-term equipment maintenance.
Melia Associates is a trusted HVAC manufacturer’s representative serving Connecticut and Western Massachusetts. With extensive experience in commercial ventilation, air distribution, and indoor air quality, Melia helps engineers, mechanical contractors, and building owners specify effective HVAC solutions. By offering Conspec Controls’ gas detection and monitoring products, Melia supports safer building environments through CO and NO₂ monitoring, refrigerant leak detection, and demand-controlled ventilation applications, backed by knowledgeable product selection and technical support.
Ontor is a Canadian master distributor and sales representative specializing in heating, ventilation, air conditioning, and refrigeration (HVAC-R) products. Serving HVAC wholesalers and equipment manufacturers throughout Canada, Ontor provides access to quality components and technical solutions for commercial and industrial applications. Its partnership with Conspec Controls expands access to gas detection systems for refrigerant leak monitoring, mechanical room safety, and commercial ventilation, helping Canadian HVAC-R professionals protect facilities and address evolving safety requirements.
