HVAC thermometers

Fast, accurate and robust HVAC tools designed for engineers, including thermometers, manometers, pressure meters and air probes.

HVAC thermometers

HVAC professionals rely on precise measurement instruments to install and maintain compliant, effective heating and cooling systems. Choosing the right instruments makes tasks quicker and easier whilst ensuring happy customers and a protected reputation.

At ETI, our instruments are made by measurement experts with over 40 years of experience in designing products specifically for professionals who need to maintain high standards.

Our HVAC range includes UK-manufactured manometers and pressure meters, robust thermocouple thermometers, and purpose-built air and pipe probes that help engineers install equipment, diagnose issues and keep systems working efficiently with confidence and ease.

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  • Therma 1 Industrial Digital Thermometer

    Therma 1 Industrial Digital Thermometer

    Therma 1 Industrial Digital Thermometer

    £65.00
    £78.00 inc. VAT
    Regular price £65.00 Sale price £65.00
    Sale price inc. VAT £78.00 inc. VAT
  • Therma Waterproof Type K Thermometer with IP66/67 protection

    Therma Waterproof Type K Thermometer with IP66/67 protection

    Therma Waterproof Type K Thermometer with IP66/67 protection

    £90.00
    £108.00 inc. VAT
    Regular price £90.00 Sale price £90.00
    Sale price inc. VAT £108.00 inc. VAT
  • Pipe Clamp Temperature Probe - HVAC Probe

    Pipe Clamp Temperature Probe - HVAC Probe

    Pipe Clamp Temperature Probe - HVAC Probe

    £26.00
    £31.20 inc. VAT
    Regular price £26.00 Sale price £26.00
    Sale price inc. VAT £31.20 inc. VAT
  • Thermapen® | Air Probe

    Thermapen® | Air Probe

    Thermapen® | Air Probe

    £66.00
    £79.20 inc. VAT
    Regular price £66.00 Sale price £66.00
    Sale price inc. VAT £79.20 inc. VAT
  • Premium Thermometer Kit for HVAC

    Premium Thermometer Kit for HVAC

    Premium Thermometer Kit for HVAC

    £182.50
    £219.00 inc. VAT
    Regular price £182.50 Sale price £182.50
    Sale price inc. VAT £219.00 inc. VAT
  • Therma Differential Two Channel Differential Thermometer

    Therma Differential Two Channel Differential Thermometer

    Therma Differential Two Channel Differential Thermometer

    £94.00
    £112.80 inc. VAT
    Regular price £94.00 Sale price £94.00
    Sale price inc. VAT £112.80 inc. VAT
  • Stainless Steel Pipework Thermometer - 60mm dial

    Stainless Steel Pipework Thermometer - 60mm dial

    Stainless Steel Pipework Thermometer - 60mm dial

    £14.00
    £16.80 inc. VAT
    Regular price £14.00 Sale price £14.00
    Sale price inc. VAT £16.80 inc. VAT
  • Magnetic Radiator or Pipe Thermometer

    Magnetic Radiator or Pipe Thermometer

    Magnetic Radiator or Pipe Thermometer

    £17.00
    £20.40 inc. VAT
    Regular price £17.00 Sale price £17.00
    Sale price inc. VAT £20.40 inc. VAT
  • 9202 Manometer Differential Pressure Meter

    9202 Manometer Differential Pressure Meter

    9202 Manometer Differential Pressure Meter

    £80.00
    £96.00 inc. VAT
    Regular price £80.00 Sale price £80.00
    Sale price inc. VAT £96.00 inc. VAT
  • 9200 Series Pressure Meters for Measuring Positive & Negative Differential Pressure

    9200 Series Pressure Meters for Measuring Positive & Negative Differential Pressure

    9200 Series Pressure Meters for Measuring Positive & Negative Differential Pressure

    £80.00
    £96.00 inc. VAT
    Regular price £80.00 Sale price £80.00
    Sale price inc. VAT £96.00 inc. VAT
  • 9035 Anemometer Thermometer

    9035 Anemometer Thermometer

    9035 Anemometer Thermometer

    £80.00
    £96.00 inc. VAT
    Regular price £80.00 Sale price £80.00
    Sale price inc. VAT £96.00 inc. VAT
  • Flow Cup

    Flow Cup

    Flow Cup

    £26.00
    £31.20 inc. VAT
    Regular price £26.00 Sale price £26.00
    Sale price inc. VAT £31.20 inc. VAT
  • Standard Thermometer Kit for HVAC

    Standard Thermometer Kit for HVAC

    Standard Thermometer Kit for HVAC

    £128.00
    £153.60 inc. VAT
    Regular price £128.00 Sale price £128.00
    Sale price inc. VAT £153.60 inc. VAT
Thermapen® | Air Probe

Why HVAC Monitoring Matters

Improves efficiency

Helps fine-tune system performance, such as balancing airflow across diffusers or optimising boiler flow and return temperatures, so equipment runs effectively and wastes less energy.

Prevents failures

Catches early warning signs during checks, such as rising static pressure across a dirty filter or incorrect superheat/subcooling in a heat pump, before they lead to breakdowns or callbacks.

Ensures safety and compliance

Confirms safe, compliant operations, such as verifying combustion readings on gas boilers or confirming ventilation rates in ductwork meet building requirements.

ETI’s Trusted HVAC Tools

Robust type K thermocouple thermometers

Accurate and durable thermometers designed for industrial use and made in the UK. Pair with air probes to measure supply and return air temperatures in ducts, air handling units, and ventilation systems, and with pipe probes to check flow in return pipework, refrigerant lines, and heating systems. Waterproof and differential models available.

9202 Manometer

A high-precision, low-pressure digital manometer designed for HVAC engineers working on ventilation and gas systems. Ideal for checking duct static pressure, filter condition, air handling unit performance and balancing airflow in commercial and industrial HVAC systems.

9200 Series Pressure Meters

A versatile range of differential pressure meters for HVAC engineers needing reliable readings across air and gas systems. Used for system commissioning, monitoring pressure drops across coils and filters, and diagnosing performance issues in heating, cooling and ventilation equipment.

9035 Anemometer

A simple handheld anemometer and thermometer designed for HVAC engineers carrying out airflow checks and ventilation balancing. Used to measure air velocity at grilles, diffusers and ducts, verify system performance during commissioning, and quickly assess airflow in occupied or outdoor environments.

 

 

Frequently Asked Questions

What is a pressure meter used for?

Pressure meters measure air or gas pressure across a wider range than standard manometers. They are used in industrial, HVAC, and engineering applications where higher pressures need to be monitored.

What is the difference between gauge and differential pressure?

Gauge pressure measures pressure relative to atmospheric pressure. Differential pressure measures the difference between two pressure points, often used to monitor filters, ducts, or airflow.

Can manometers measure gas pressure?

Yes, manometers are commonly used to measure gas pressure in heating appliances and systems, provided the gas is non-corrosive.

Do manometers need calibration?

Yes, regular calibration helps ensure readings remain accurate over time. This is important for maintaining confidence in measurements and supporting inspection or testing requirements.

You can send your manometer, pressure meter or anemometer to us for 3-point traceable recalibration at our UK laboratory. Learn more about our calibration services.

How accurate are digital manometers?

High-quality digital manometers provide reliable and repeatable readings when used correctly. Accuracy depends on the model and proper use, but they are designed for precise low-pressure measurement.

What are manometers used for?

Manometers are used for tasks such as testing gas pressure, measuring flue draught, checking ventilation systems, and monitoring filter performance.

What is a manometer?

A manometer is a device used to measure air or gas pressure. It is commonly used to check pressure in HVAC systems, gas appliances, and industrial processes.

How to choose an industrial thermometer?

When selecting a thermometer for your industrial application, some common features to consider are:

  • Waterproofness — protection from water and dust
  • Range — the highest and lowest temperatures required
  • Accuracy — the potential margin for error
  • Hold — locking readings on-screen for easy recording
  • Max/min — the maximum and minimum temperatures over a period

How accurate should an industrial thermometer be?

Accuracy requirements vary, but many industrial applications require readings within ±0.5 °C to ±1 °C. More critical processes may demand higher precision.

What is the best way to measure pipe temperatures?

The best way to measure pipe temperatures is to use a pipe clamp temperature probe. These probes are specifically designed to maintain good contact with the pipe surface for greater accuracy. They can also be left in place while carrying out processes such as radiator balancing.

Which is the best thermometer for radiators?

The best thermometer for radiators is a surface probe combined with a thermocouple thermometer. This method provides highly accurate results.

For quick checks you can use an infrared thermometer, or for a budget-friendly option you can choose a magnetic temperature dial.

Read our guide to radiator and pipe thermometers to learn more.