Made in USA
No wiring to pull, no software to install, and no account to create. Mount it, power it, pair it, and the first reading is on screen.
Wall-mount or magnet-mount the enclosure wherever you need readings, a grow room, warehouse, office, or cold store. An external-probe-mounted version places the sensor in a duct or hard-to-reach spot and seals its electronics enclosure to IP65.
A D-cell with Supercap runs the sensor for a long stretch between swaps. Where mains power is handy, an optional external power connector runs it continuously.
The sensor joins your wireless mesh on its on-board antenna, with no pairing steps and no network configuration to work through.
CO2, temperature, and humidity stream to a gateway or Atrium, where you can chart trends and fire alerts the moment a reading drifts out of range.
Pair the sensor with an Atrium Gateway, open a browser on your network, and drag the readings you care about onto a dashboard. No code to write.
Industrial-grade CO2, temperature, and humidity sensing with the wireless reach, battery life, and open integration to monitor conditions wherever they matter.
Measures CO2 from 400 to 5,000 ppm to ±(60 ppm + 5% of reading) with 10 ppm repeatability. The NDIR sensor is fully calibrated and linearized, temperature-compensated, and uses a built-in reference channel for superior long-term stability.
An industrial-grade element reports temperature and relative humidity alongside the CO2, to an accuracy of ±0.8 °C and ±6% RH and a resolution of 0.1 °C and 0.4% RH, across -10 to +60 °C (14 to 140 °F) and 0 to 95% RH. A complete environmental picture from one device.
Reach up to 2 miles line-of-sight on the on-board antenna over a self-healing wireless mesh, with encrypted communications, without running a single wire.
The external-probe version seals its electronics enclosure to IP65 and does the sensing on a vented probe outside it, which is what suits dusty areas and washdown. The enclosure-mounted version has to breathe to read the room it sits in, so its housing is vented and intended for indoor use rather than IP-sealed. Pick the one that matches where it goes.
Battery life is set by how often the sensor reports. A slower reporting interval stretches a D-cell with Supercap a long way, and reporting faster trades runtime for resolution. You pick the interval, battery level ships with every transmission, and an optional external power connector settles the question wherever mains power is available.
Update firmware wirelessly across your fleet, no removing devices from the wall and no climbing ladders to service every unit.
| Measurement range | 400 – 5,000 ppm |
| Accuracy | ±(60 ppm + 5% of reading) at 25 °C, 400 – 5,000 ppm |
| Repeatability | 10 ppm |
| Measurement principle | NDIR (nondispersive infrared) |
| Compensation | Temperature compensation of the CO2 signal |
| Calibration | Fully calibrated & linearized, built-in reference channel |
| Measured parameters | Temperature & relative humidity |
| Temperature range | -10 to +60 °C (14 to 140 °F) |
| Humidity range | 0 to 95% RH |
| Temperature accuracy | ±0.8 °C |
| Humidity accuracy | ±6% RH |
| Resolution | 0.1 °C / 0.4% RH |
| Frequency Bands | 868 MHz / 900 MHz / 2.4 GHz |
| Band class | Sub-GHz (868 / 900 MHz), sub-gigahertz radio travels farther and penetrates walls and equipment far better than higher-frequency Wi-Fi or Bluetooth |
| Protocol | Long-range self-healing wireless mesh |
| Range (on-board antenna) | Up to 2 miles line-of-sight |
| Encryption | 128-bit AES |
| Reliability | Validates & retries lost packets |
| Data destinations | PCs, AWS, Azure & MQTT servers |
| Battery | D-cell with Supercap |
| Battery life | Set by the reporting interval you choose |
| Battery reporting | Battery level sent with every transmission |
| Power options | Battery only, or external power connector + battery |
| Enclosure rating | External-probe version: IP65 (sealed electronics enclosure, sensing via external vented probe). Enclosure-mounted version: vented enclosure, indoor use, not IP-sealed. |
| Form factor | Enclosure-mounted or external-probe-mounted |
| Mounting | Wall-mount or magnet-mount |
| Interfaces | PCs, AWS, Azure & MQTT |
| Openness | Open protocol, no proprietary lock-in |
| Origin | Made in USA |
| Compliance | RoHS compliant |
| Wireless (regional) | FCC, IC, RCM, Anatel and others by frequency band |
| Enclosure-mounted, battery-powered | PR52-33Q |
| Enclosure-mounted, external-power | PR52-33Q_PWR |
| External-probe, battery-powered | PR52-33Q_EXP |
| External-probe, external-power | PR52-33Q_EXP_PWR |
Four ways to order. First pick where the sensing element sits, then pick how the sensor is powered. Each is a different box, but they run the same software and raise the same alerts.
The sensing element lives inside the enclosure with the electronics, so the housing is vented to let room air reach it. One box on a wall or a magnet, nothing exposed to knock loose, and intended for indoor use. This is the default for open rooms, warehouses, greenhouses, and grow spaces, where the air you care about is the air around the box.
The sensing element sits on a probe you place where the air actually matters, in a duct, inside a cabinet, or down in a spot the enclosure will not fit, while the electronics stay protected in the enclosure. Pick this when the measurement point and the mounting point are not the same place.
Then choose power. Battery-only runs on a D-cell with Supercap. The external-power version adds a wired supply connector alongside the batteries, for spots where an outlet is already there.
Anywhere CO2, temperature, or humidity has to stay in range, and a wired sensor would be impractical to install.
Grow Rooms & Drying SpacesEnrichment only pays off if the room actually holds the setpoint, and drying spaces live or die on humidity. Reading CO2, temperature, and humidity from the same point keeps all three honest against each other.
Breweries & Fermentation RoomsFermentation puts CO2 into the room continuously, and it collects low and quietly in exactly the spaces people walk into. Watching the level around the tanks means a room trending the wrong way is visible while it is still just a trend.
Greenhouse Climate ManagementGive automated vents, heaters and CO2 enrichment the readings they need to hold optimal growing conditions, instead of walking the rows to check them by hand.
Warehouse & Cold Storage ClimateHold food and pharmaceutical stock inside its storage window across an entire building, reaching the far corners of the building with no cabling to pull.
Pharmacy & Specimen StorageStorage rooms and the spaces around incubators and cold units have to stay documented, not just stable. A continuous log of temperature and humidity with room CO2 alongside it is the record, and the alert if the room drifts.
Plant Floor VentilationTrack CO2 and environmental conditions on the plant floor continuously, so ventilation decisions rest on a logged record rather than an occasional spot check.
HVAC & Smart Building ControlsFeed live CO2, temperature and humidity into the building management system so air flow, heating and cooling ramp with real occupancy instead of a fixed schedule.
Classroom & Occupied-Space Air QualityWatch CO2 climb through a long class or a full meeting room. It is the earliest sign that ventilation has stopped keeping up with the people in the room, well before anyone notices the stale air.
Data Center Environmental MonitoringKeep temperature and humidity inside the range the racks need, and alert facilities the moment an aisle drifts, before the conditions turn into equipment failure and downtime.
A carbon dioxide reading is only useful if you know where the line sits. The 400 to 5,000 ppm range on this sensor starts at outdoor air and covers the whole zone where the ventilation decision gets made.
The floor every indoor reading is measured against. Whatever is outside your building is where the room starts.
Fresh air is matching the people in the room. Nothing to do.
Air changes are not keeping pace with occupancy. The usual point to go look at airflow.
Common ventilation guidance treats roughly 700 ppm above outdoor as the comfort indicator, which lands right about here.
Well past the point where a room needs air. The sensor still reports the number so you can see how far it went.
Set the alert wherever your building policy puts it. The sensor reports the number and Atrium fires the trigger. You decide the threshold, and you can change it without touching the hardware.
That 400 to 5,000 ppm span is the working range for offices, classrooms, warehouses, cold stores, and grow rooms held at an enrichment setpoint, which is where a ventilation or climate decision actually gets made. It is a ventilation and climate instrument, not a confined-space or life-safety gas detector. A space that has to be watched against a CO2 hazard threshold needs an instrument built for that job.
The math is simple. One purchase versus compounding monthly fees.
Air conditions are one part of the room. These sensors cover the rest and report to the same Atrium gateway.
Differential Pressure SensorPipe it across the filter bank or between two rooms. A loading filter or lost room pressure shows up before anyone feels the airflow change.
Particulate Matter SensorAdd it where dust or smoke is the concern. It counts particles down to PM0.5.
Water Detect Puck SensorDrop it under the air handler or on the server-room floor. A leak alerts on the same dashboard as the room’s climate.
Everything you need to know about the Industrial IoT Wireless CO2 Temperature Humidity Sensor.
It measures carbon dioxide (CO2) from 400 to 5,000 ppm, plus temperature and relative humidity, all from a single wireless sensor. Every reading transmits to a gateway or the Atrium platform.
CO2 accuracy is ±(60 ppm + 5% of reading) at 25 °C over the 400 – 5,000 ppm range, with 10 ppm repeatability. The sensor is fully calibrated and linearized at the factory.
NDIR (nondispersive infrared) is the industrial-grade method for measuring CO2 by how much infrared light the gas absorbs. This sensor adds temperature compensation of the CO2 signal and a built-in reference channel for superior long-term stability, so readings stay trustworthy over years of use.
The integrated sensor reads temperature to ±0.8 °C and relative humidity to ±6% RH, with a resolution of 0.1 °C and 0.4% RH. (These figures are for the combo unit’s built-in temperature/humidity sensor.)
It measures temperature from -10 to +60 °C (14 to 140 °F) and relative humidity from 0 to 95% RH.
Up to 2 miles line-of-sight using its on-board antenna. Sensors can also relay through one another to extend coverage across larger or obstructed sites.
It runs on a D-cell with Supercap. How long that lasts depends on how often you have it report. Every transmission also includes the current battery level so you can plan swaps in advance. An optional external power connector variation is available for locations with mains power.
Yes. The sensor comes in two form factors: an enclosure-mounted version, and an external-probe-mounted version that places the sensing element in a duct or hard-to-reach spot while the electronics stay protected. Both can be wall-mounted or magnet-mounted.
It sends data to PCs, Amazon AWS, Microsoft Azure, and MQTT servers, using an open communication protocol.
Yes. Paired with NCD’s Atrium platform, a high CO2 reading can fire email notifications, log the event, and actuate relay outputs, switching on a ventilation fan or alarm, all configured without writing code.
No. It is a one-time purchase, and there are no locked proprietary protocols.
Wherever you choose, there’s no required NCD cloud account, so readings stay on your network and forward to Azure, AWS, a local SCADA system, or your own application. The sensor is designed and manufactured in-house by National Control Devices in the USA and is RoHS compliant, and many NCD products carry a 5-year warranty.
We publish our prices. There is no quote form, no login and no sales call between you and the number. The Ordering section of the spec table names each version we sell and its part number, so you can match the one you want before you order.
No, and this matters. It measures carbon dioxide for ventilation, occupancy and air-quality work. It is not a carbon monoxide detector, it is not a combustible gas detector and it is not a life-safety alarm. Those are different, certified devices. Use this to understand and control ventilation, and use dedicated safety equipment for safety.
Our engineers answer in public on the community forum, and the thread stays up for the next person with the same question.
Ask on the NCD Community ForumOwn the hardware and the data, and monitor CO2, temperature, and humidity across your whole site.
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