Stellar Industries 21650 Oil Temperature Swichgage – 140–300°F

If you’re unsure whether this part is compatible with your truck or equipment, please contact us to confirm fitment before purchasing.

The Stellar Industries 21650 Oil Temperature Gauge is a heavy-duty 2-inch mechanical Swichgage designed to monitor oil temperature on compatible Stellar equipment. It has a 140–300°F temperature range, a six-foot capillary tube, a style-D sensing bulb, and a 1/8-27 NPT adapter connection.

The built-in high-temperature switch has a rising set point of 240°F and can activate a warning or equipment shutdown circuit. This combination gauge and temperature switch helps protect hydraulic and compressor components from damage caused by overheating.

What This Part Is Used For

The Stellar 21650 gauge provides continuous oil-temperature readings while supporting a high-temperature warning or shutdown circuit. Its remote sensing bulb and capillary tube allow the gauge to monitor oil temperature away from the instrument panel.

Common Reasons For Replacement

Gauge displays an inaccurate temperature
Needle is stuck or does not move
Capillary tube is kinked, broken, or leaking
Temperature-sensing bulb is damaged
High-temperature switch fails to activate
Lens, bezel, or gauge housing is damaged
Equipment experiences false overheat shutdowns

Key Features

Stellar Industries part number 21650
Two-inch oil-temperature Swichgage
Temperature range of 140–300°F
High-temperature set point at 240°F
Six-foot capillary tube
Style-D temperature-sensing bulb
1/8-27 NPT adapter connection
Combination temperature indicator and limit switch
Can support warning or automatic shutdown circuits