Axial thermometer 0°C - 120°C, 100 mm

Product detailed description

Thermometers of this type are commonly installed in heating systems in residential and commercial buildings, including boiler rooms, underfloor heating circuits and central heating units. Installers and service technicians use them to monitor the temperature of heated water in real time. The axial design allows for installation in tight spaces, where a side-mounted connection is more practical than a front-mounted one. The 100 mm dial size ensures visibility from a distance, which is particularly useful in environments with multiple monitoring points or where regular checks are required without close proximity to the device.

These thermometers are typically used in closed-loop heating systems where the temperature of the circulating water needs to be continuously monitored. The bimetallic spiral inside reacts to temperature changes, making it suitable for systems with fluctuating thermal loads. The steel body and brass connection are resistant to long-term exposure to heated water, making them ideal for permanent installation in wet environments. The device is not intended for use in steam systems or with aggressive media.

Technical parameters

Installation and connection

The thermometer is installed in a straight section of the pipe, with the dial facing the observer for easy reading. The rear axial 1/2 inch connection requires a compatible threaded fitting. Installers should ensure that the connection is tightened to the manufacturer's torque specifications to prevent leaks. A common mistake is failing to align the thermometer correctly, which can cause inaccurate readings or mechanical stress on the connection. The device should be mounted in a location free from direct sunlight and radiant heat sources to avoid external temperature interference.

Compatibility and accessories

This thermometer is compatible with standard heating system piping and fittings that use 1/2 inch threaded connections. No additional accessories are required for installation. It is suitable for use with copper, steel and plastic pipes. Installers should ensure that the system is depressurised before fitting the device to avoid injury or damage. There are no related products for this model.

Technical background for designers

The operating principle is based on a bimetallic spiral, which expands or contracts in response to temperature changes. The spiral is connected to a pointer that moves across the dial. The steel body provides structural integrity and resistance to thermal expansion, while the brass connection ensures compatibility with standard pipe fittings. The device is designed for integration into heating systems with a nominal pressure rating that matches the system's operating conditions. Long-term performance depends on the stability of the installation environment and the absence of mechanical vibrations that could affect the pointer movement.

Service and operation

There are no scheduled service intervals for this device. Installers should periodically check the connection for leaks and ensure that the pointer moves freely across the dial. If the pointer becomes stuck or the readings are inconsistent, the device should be replaced. The acryl cover protects the dial from scratches and environmental exposure. No calibration is required during the warranty period.

Frequently asked questions

Can this thermometer be used in a domestic hot water system?
Yes, it is suitable for monitoring the temperature of hot water in domestic systems, provided the temperature does not exceed 120°C.

Is the 1/2 inch connection compatible with copper pipe fittings?
Yes, the brass connection is compatible with standard copper pipe fittings that use a 1/2 inch thread.

Can the device be installed in a vertical pipe?
Yes, the axial design allows for installation in vertical pipes, as long as the dial is positioned for clear visibility.

Does the steel body require additional corrosion protection?
No, the steel body is designed to resist corrosion in wet environments, and no additional protection is required.