PyroMini Miniature Infrared Temperature Sensor with Separate Electronics Module




Two-Part Pyrometer for High Temperature and Metals Objectives (100°C to 2000°C)
PT models: 100°C to 400°C

MT models: 250°C to 1000°C
HT models: 450°C to 2000°C

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The PyroMini 2.2 Series is a range of short-wavelength miniature non-contact infrared temperature sensors with separate electronics modules.

All models use a short measurement wavelength for greater accuracy, and improved tolerance of optical obstructions or errors in emissivity setting, than long-wavelength sensors.

The optional touch screen display on the electronics module provides temperature indication, alarms, configuration and data logging to MicroSD Card.

A choice of optics is available for the accurate measurement of small or large targets at short or long distances, and there is a choice of 4-20 mA, RS485 Modbus and alarm relay outputs.


  • Temperature ranges from 100°C to 2000°C

  • Short wavelength measurement for better accuracy on reflective targets such as many metals

  • 4-20 mA or RS485 Modbus outputs

  • Miniature sensing head and configurable electronics module

  • Touch screen interface (optional)

  • Data logging to MicroSD Card (optional)

Temperature Range:
PT models: 100°C to 400°C
MT models: 250°C to 1000°C
HT models: 450°C to 2000°C
Max. Temperature Span (-CRT models): Full temperature range (up to 1550°C)
Min. Temperature Span (-CRT models): 100°C
Output: 4-20 mA or RS485 Modbus (Up to 247 sensors may be installed on a single Modbus network)
Field of View: Choice of wide-angle or focussed optics (see Field of View Diagrams below)
Accuracy: ± 2°C or 1% of reading, whichever is greater
Repeatability: ± 0.5°C or 0.5% of reading, whichever is greater
Emissivity Setting: Adjustable, 0.10 to 1.00
Emissivity Setting Method:
-CB models: via two rotary switches in electronics module 
-BB and -BRT models: via RS485 Modbus
-CRT and -BRT models: via touch screen
Response Time, t90: ≥240 ms (90% response)
Spectral Range: 2.0 to 2.6 μm
Supply Voltage: 24 V DC ± 5%
Maximum Current Draw: 100 mA
Max. Loop Impedance (-CB and -CRT models): 900 Ω (4-20 mA output)
Alarm Relays (-CRT and -BRT models): 2 x Single Pole Changeover alarm relays, rated 24 V DC, 1 A, isolated 500 V DC

Data Logging Specifications

Data Logging Interval: 1 to 86,400 seconds (1 day)
MicroSD Card: Max. capacity: 32 GB (not included)
Internal Clock Battery: 1 x BR 1225 3V (not included)
Variables Logged: Target temperature, sensing head temperature, electronics module temperature, max, min, average, emissivity setting, reflected energy compensation Temperature, alarm events
File format: .csv
Configurable Parameters: Sample period, number of samples, scheduled start date and time

Field of View Diagrams

Please note: The given measured spot diameter contains 90% of the energy detected by the sensor. For maximum accuracy, we normally recommend the target is at least twice as large as the given measured spot. The sensor may be used at longer distances than shown above. In clean air there is no maximum measurement distance, and the distance does not affect the sensor's measurement accuracy; this is because the sensor is filtered to detect only the wavelengths of IR that are not absorbed by the atmosphere.

Electromagnetic Compatibility Standards

The PyroMini 2.2 series conforms to EMC Directive EN61326-1:2006 (Electrical equipment for measurement, control and laboratory use – Industrial) as well as industrial standards for electromagnetic immunity and emissions.

Electrical Installation

Dimensions (mm)

PM180 6-Channel Hub

6-channel touch screen hub for temperature display, alarms, configuration and data logging, compatible with PyroMini Modbus models, PyroMiniBus and PyroBus sensors. Isolated RS485 Modbus master and slave interfaces allow multiple hubs to be connected to a larger network. Optional modules provide analogue and relay outputs.

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.

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.

Dual Laser Sighting Bracket

The Dual Laser Sighting Bracket is a sturdy mount for the sensor and provides continuous target sighting while measurements are being taken. Two parallel lasers indicate the centre of the measured spot and are controlled by a remote switch on the electronics module.

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.

PID Controllers and Indicators

The 4-20 mA output of PyroMini 2.2 -CB and -CRT models may be connected to any of our indicating controllers for PID control.

New HCF Optics for PyroMini

Close Focus optics are now available for PyroMini models with the "HA" sensing head for 180°C ambient temperature. 

The new HCF optics are focused to a 6.5 mm spot at a distance of 60 mm. 

PM-HA-HCF sensors are available to order now. 

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