Pyrometer with digital CAN interface

Sensor Features

  • Non-contact infrared temperature sensor with CAN Bus interface
  • Temperature range: -20°C to 1000°C
  • Raw CAN protocol
  • Configurable CAN ID and adjustable emissivity setting
  • Not designed or approved for fever detection

General Specifications

Temperature Range
-20°C to 1000°C
±1% of reading or ±1ºC whichever is greater
± 0.5% of reading or ± 0.5°C whichever is greater
Emissivity Setting
Adjustable via CAN, 0.2 to 1.0
Response Time, t90
200 ms (90% response)
Spectral Range
8 to 14 μm
Supply Voltage
12 to 24 V DC
Supply Current
50 mA max.

CAN Protocol Specifications

Baud Rate
250 kbps
Data format
8 bytes total:
Bytes 1-4: Object temperature as floating point
Bytes 5-8: Ambient temperature as floating point
Transmit interval
200 ms
CAN ID range
ID can be set between 0 and 255 as a 4-byte unsigned integer
Adjustable from 0.2 to 1.0 as a 4-byte floating point

Field of View Diagrams

Please note: The given measured spot size contains 90% of the energy detected by the sensor. We normally recommend the target is at least twice as large as the given measured spot for maximum accuracy. Sensors may be used at longer distances than the above diagrams show. There is no maximum measurement distance in clean air; this is because the PyroCAN detects only the wavelengths of infrared radiation that are not absorbed by the atmosphere.

Mechanical Specifications

Stainless Steel
18 mm diameter x 103 mm long
Thread Mounting
M16 x 1 mm pitch
Cable Length
1m (longer lengths available to order)
Weight with Cable
95 g

Environmental Specifications

Environmental Rating
Ambient Temperature Range
0°C to 90°C
Relative Humidity
95% max. non-condensing

Electromagnetic Compatibility Standards

EN61326-1, EN61326-2-3 (Electrical Equipment for Measurement, Control and Laboratory Use – EMC Requirements – Industrial)

The PyroCAN measures the temperature of a surface and transmits it via CAN Bus using the Raw CAN protocol.

The sensor can be connected to a network with more PyroCAN sensors and other types of CAN device. A configurable CAN ID allows it to be connected easily to an existing network.

Adjustable emissivity allows a variety of materials to be measured with high accuracy and repeatability. For assistance on obtaining accurate results in your application please contact Calex.

Typical Applications

Automotive testing
Multiple sensors can be mounted in various locations around a vehicle during testing, to monitor the surface temperatures of engine blocks, suspension parts, belts and exhausts.
Industrial and agricultural vehicles
The PyroCAN allows temperature monitoring on vehicles throughout industry and agriculture. The process temperature can be accurately monitored without contact, and parts of the vehicle can be monitored with the same sensor.

Each sensor is fitted with a 1-metre cable as standard. Longer lengths are available to order, or you can extend the cable using terminal blocks.

Electrical Installation

Dimensions (mm)

Air Purge Collar

The air purge collar is used to keep dust, fumes, moisture and other contaminants away from the lens. Air flows into the fitting on the side and out of the aperture at the front.

Fixed Mounting Bracket

The L-shaped fixed mounting bracket offers a rigid support for the sensor and allows fine rotational adjustment about one axis.

Adjustable Mounting Bracket

The adjustable mounting bracket consists of a fixed mounting bracket plus another L-shaped bracket. When assembled as shown, the adjustable mounting bracket offers a rigid support for the sensor and allows fine two-axis adjustment.

Gooseneck Mount

This stiff, self-supporting steel gooseneck for Calex sensors can be attached securely to machinery via a robust aluminium mounting block.

Simply grab the sensor, move it, and the gooseneck will hold it in position. It is the quickest, easiest way to adjust the aim of the sensor.

Gooseneck Mount Data Sheet (

Air/Water Cooled Housing

The air/water cooled housing allows the sensor to withstand ambient temperatures above the normal 70°C limit. Depending on the degree of cooling required, air or water may be used as the cooling fluid. To prevent condensation forming on the lens, an air purge collar is included with this item. The air/water cooled housing must be ordered with the sensor and cannot be fitted by the user.

Laser Sighting Tool

The Laser Sighting Tool screws onto the front of the sensor during installation and shows precisely where the sensor is aiming. Once the sensor has been aimed at the centre of the target and locked in position, the Laser Sighting Tool can be removed. The laser is operated via a latching push button on the front of the tool.

Data Sheet / Operator’s Guide (PDF)

Protective Plastic Window

When fitted over the lens of the sensor, the protective plastic window in stainless steel holder provides mechanical protection and helps retain fragments of lens in case of damage. Adjust the sensor’s emissivity setting to compensate for the presence of the window for maximum accuracy. This accessory is ideal for the food and pharmaceutical industries.

Operator’s Guide – Protective Windows

The PyroCAN is available worldwide from our network of distributors. Contact Calex for to find out where you can order the PyroCAN in your country.

Popular Models: PCAN21, PCAN201

Model Numbers