Bi-metallic thermometer, rear G 1/2, Immersion shaft length 40 mm - Riegler 102766

Bi-metallic thermometer for heating, Connection rear, G 1/2, Immersion shaft length 40 mm, Ø 80 mm, Display range 0 °C to 120 °C Applications: Heating, plumbing, universal.

Technical data

Standards and origin

• Customs tariff number: 90251900
• Country of origin: DE

About Bimetallic thermometers

Bi-metallic thermometers indicate medium temperature purely mechanically, with no power supply and no evaluation unit. The series covers dial diameters from 63 to 100 mm and is built for general industrial use. Depending on the version the instrument is screwed in directly or fitted into a thermowell.

What matters when choosing

• Connection type: 24 items carry a G 1/2 male screw-in thread, 27 items a plain immersion shaft with collar for a thermowell, Ø 18 mm. The decision depends on whether the thermometer has to be replaceable while the plant runs.
• Diameter: 63 to 100 mm. The larger dial helps when reading from a distance, the smaller one fits tight pipe runs.
• Case: CrNi steel 1.4301 for harsher surroundings and cleaning areas, plastic for simpler indoor duties.
• Immersion shaft length has to match wall thickness and pipe cross section so that the sensing tip sits in the flowing medium and not in the boundary layer.
• Indication range: choose it so that the working temperature does not sit at either end of the scale.

Typical applications

• Heating and hot water circuits where flow temperature should be visible on site
• Cooling circuits on machine tools and hydraulic power units
• Vessel and tank walls, measured through a thermowell without interrupting the process
• Ventilation and drying plants with duct mounting
• Process water and cleaning systems as a mechanical cross-check next to electronic control

All 51 items in this group are made in Germany. The case comes either in CrNi steel 1.4301 or in plastic, and the directly screwed-in version needs no thermowell.