Infrared Thermometers: Accurate, Non-Contact Temperature Measurement Made Simple

Explore how IR thermometers work, where they’re used, and which models are right for your needs.

When it comes to fast, hygienic, and safe surface temperature measurement, infrared thermometers are the go-to solution. Ideal for checking both extremely high and low temperatures, they’re widely used across industries where non-contact readings are essential – from food safety to automotive diagnostics and industrial maintenance.

At ATP Instrumentation, we offer a range of high-performance infrared thermometers designed to suit different environments and user needs. In this blog, we’ll explain how they work, where you’ll find them in action, and introduce some of the top models from our range.

How Do Infrared Thermometers Work?

Infrared (IR) thermometers measure surface temperature by detecting the infrared radiation (heat) emitted by an object. Because they don't require physical contact, they’re perfect for hard-to-reach, moving, hazardous, or sanitary-sensitive surfaces.

Many IR thermometers include features like:

Laser targeting – helps identify the centre of the measurement area
Emissivity adjustment – improves accuracy on different surface materials like metal, plastic, or painted finishes
Fast response times – delivering quick and reliable readings in seconds

Where Are IR Thermometers Used?

Thanks to their versatility, infrared thermometers are found in a variety of settings:

Automotive – for checking engine blocks, exhausts, brake systems and cooling components
Air Conditioning & HVAC – monitoring vents, ducts, and compressor units
Food Storage & Handling – ensuring cold storage, preparation, and transport meet safety standards
Industrial Manufacturing – particularly where components reach extreme temperatures during processing

Recommended Infrared Thermometers

We stock a carefully selected range of infrared thermometers suitable for professional and industrial use:

Pen-Type Infrared Thermometer

The AIR-86 is a reliable, entry-level infrared thermometer designed for quick, safe, and accurate spot checks across a wide range of general-purpose applications. With a non-contact measurement range of -50°C to +550°C, it's perfectly suited for use in routine maintenance, electrical inspections, HVAC servicing, and light industrial environments.

The AIR-86 also includes:

Large digital display for easy reading
Fast response time for quick measurements on the go
Ergonomic, lightweight design for comfortable daily use
Fixed emissivity for simplified operation on standard surfaces

Whether you're checking for overheating components, monitoring cooling systems, or carrying out general temperature spot checks, the AIR-86 provides a cost-effective and dependable solution for non-contact temperature measurement.

Laser Infrared Thermometer

The AIR-801 is a high-performance infrared thermometer designed for professionals who need dependable accuracy in demanding environments. With a wide temperature range of -50°C to +800°C, this unit is built for serious applications such as automotive diagnostics, HVAC system checks, electrical safety inspections, and industrial equipment maintenance.

Key features include:

Adjustable emissivity to optimise readings across different surface types (metal, plastic, painted finishes, etc.)
Backlit digital display for clear visibility in low-light environments
Fast response time and consistent readings
Data hold and auto power-off functions to conserve energy and streamline use
Ergonomic grip and lightweight design for all-day professional use

Whether you're checking heat output on vehicle engines, assessing airflow temperatures, or ensuring machinery stays within safe limits, the AIR-801 offers a reliable, accurate, and user-friendly solution for non-contact temperature measurement in the field.

Laser Infrared & K-Type Thermometer with Humidity

The AIR-817 is a professional-grade infrared thermometer built for high-accuracy temperature measurement in demanding environments. With a wide range of -50°C to +1000°C, it's ideal for use in industrial machinery, manufacturing lines, and electrical systems.

Key features include:

Fast response time for real-time monitoring
Backlit LCD display for low-light use
Max/min/average temperature functions
Ergonomic, durable design for everyday professional use

Whether you're monitoring motors, heating elements, or high-temperature components, the AIR-817 offers reliable performance and precision where it matters most.

Hi-Temperature Laser Infrared Thermometer

The AIR-829 is a professional-grade thermometer that offers dual measurement capability, combining non-contact infrared readings with a Type K thermocouple input. This makes it ideal for applications where both surface and internal temperatures need monitoring – such as metalworking, engineering, and process control.

Key features:

Dual-mode: IR + Type K
Fast response with max/min/avg functions
Backlit LCD for low-light use
Rugged, ergonomic design for professional settings

The AIR-829 is a flexible and reliable tool for critical temperature monitoring in both contact and non-contact scenarios.

Choosing the Right IR Thermometer

When selecting an infrared thermometer, consider:

Temperature range – ensure it covers your intended applications
Accuracy and response time – critical for quality control or compliance
Surface type – opt for adjustable emissivity if you’re measuring varied materials
Targeting needs – dual laser helps with pinpoint accuracy, especially from a distance