REF #3294
Temperature Gauge
Temperature gauges measure the temperature of a liquid, gas or surface in a system, displaying the reading on a calibrated bimetallic or gas-actuated dial. They are used across heating and hot water systems, industrial process equipment, cooling circuits and steam lines where continuous temperature monitoring is needed. The Hosemaster stocks temperature gauges in standard industrial formats with BSP connections, suitable for direct immersion or thermowell installation in most commercial and industrial applications.-
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63mm HVAC Pipe Mounting Thermometer
£60.16 INC VAT
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£50.13 EXC VAT
Temperature gauges for heating, process and industrial systems
Temperature gauges are a basic but important part of any system where heat is part of the process. A boiler system needs to know water temperature to control firing. A cooling circuit needs to confirm the heat exchanger is doing its job. A steam line needs temperature monitoring to manage process conditions safely. A temperature gauge provides that information continuously, without any power supply or signal wiring.
The key specification variables are the temperature range, the stem length and the connection type. The temperature range needs to cover the expected operating conditions with some margin — a gauge at the top of its range gives less accurate readings and is more susceptible to damage from temperature spikes. Stem length determines how far the sensing element projects into the pipe or vessel — match it to the pipe diameter and the required immersion depth. Connection is usually BSP in UK industrial applications.
For systems where the process medium is aggressive, or where the gauge needs to be removed periodically for calibration or replacement, a thermowell installation is worth specifying. It adds a component but protects the gauge and keeps the system running during maintenance.
Frequently Asked Questions
What is a temperature gauge used for?
A temperature gauge monitors the temperature of a liquid or gas in a system. Common applications include hot water and heating systems, steam lines, industrial process equipment and cooling circuits where temperature needs to be monitored continuously during operation.
How does a bimetallic temperature gauge work?
A bimetallic temperature gauge uses a coiled bimetallic strip — two metals bonded together with different thermal expansion rates. As temperature changes, the strip curves or uncurls, moving a pointer across the dial. They're reliable, need no power supply and suit most industrial temperature monitoring applications.
What is a thermowell?
A thermowell is a closed-end tube fitted into a pipe or vessel that allows a temperature gauge to be inserted into the process without direct contact with the fluid. The gauge stem sits inside the thermowell, and heat transfers through the well wall to the sensor. Thermowells protect the gauge from corrosive media and allow gauges to be removed for maintenance without shutting down the system.
What temperature range do your gauges cover?
Temperature ranges vary by product. Check the individual product listing for the specific range, connection size and stem length. Standard industrial gauges typically cover ranges from around 0–120°C up to 0–300°C depending on the application.