Domer dial surface thermometer 63 mm 4838 — analog dial for surface temperature measurement

The Domer dial surface thermometer model 4838 is an analog instrument with a 63 mm diameter circular dial designed for direct measurement of surface temperature. Its mechanical pointer provides an immediate, easy-to-read indication of temperature without the need for power or electronics. The thermometer is intended for mounting on flat surfaces of equipment, ducts or enclosures where basic, robust temperature monitoring is required.

Advantages

This surface thermometer delivers straightforward, maintenance-free temperature readings through a clear analog dial and a mechanical pointer. Its compact 63 mm diameter face balances visibility and space economy, making it suitable for confined panels or machine housings. The absence of electronic components reduces sensitivity to electrical interference and eliminates the need for batteries or external power sources, providing long-term reliability in simple monitoring applications.

Suitable for

• HVAC systems and duct surfaces
• Industrial machinery housings and panels
• Heat exchangers and pumps with accessible exterior mounting points
• General-purpose surface temperature checks in workshops and utility rooms

Key specifications

• Display type: Analog dial with mechanical pointer
• Dial diameter: 63 mm
• Measurement target: Surface temperature
• Mounting: Surface-mounted on flat panels or housings
• Operation: Mechanical, no external power required

How to use

Mount the thermometer on the chosen flat surface using appropriate screws or panel fittings so the sensor or contact area lies flush with the measured surface. Ensure good thermal contact by tightening mounting hardware without deforming the instrument. Read the temperature directly from the dial pointer; allow a short stabilization time after installation for the pointer to settle to the actual surface temperature. For repeatable measurements, place the instrument away from direct airflow or localized heat sources that may skew readings.

Usage recommendations

For accurate readings, install the thermometer on clean, dry surfaces and avoid loose mounting that can reduce thermal contact. Periodically inspect the dial and mounting for mechanical damage or dirt that could impede pointer movement. If monitoring critical processes, use this device as a local visual indicator alongside calibrated instruments when precise measurement or traceability is required.