Wika 51090A003G4 Bimetal Dial Thermometer 9 in Stem

Product Description

The WIKA 51090A003G4 is a bimetal dial thermometer designed for temperature measurement in industrial and mechanical systems. It features a 9-inch stem length with a bottom-connected mount, making it suited for insertion into pipes, tanks, wells, or process lines where a direct lower-entry connection is required. The sensing range runs from 25 degrees F to 125 degrees F, covering typical water, HVAC, and light process applications. The housing and stem are constructed from stainless steel with an 18-8 material grade, providing corrosion resistance in wet or humid environments. Accuracy is rated at plus or minus 1.0 percent of full scale. Licensed tradespeople and mechanical contractors use this thermometer for permanent monitoring installations.

This thermometer is suited for residential and light commercial HVAC systems, plumbing distribution lines, hydronic heating loops, and process piping where ambient or fluid temperatures fall within the 25 degrees F to 125 degrees F range. The bottom-connected mount allows straight insertion through a threaded well or fitting in vertical or horizontal pipe runs. It is commonly installed by plumbers, pipefitters, and HVAC technicians requiring a reliable, easy-to-read dial instrument without requiring external power.

Key Features

• Temperature range of 25 degrees F to 125 degrees F (-5 degrees C to 50 degrees C)
• 9-inch stem length for insertion into deeper pipe or tank installations
• Bottom-connected mount for direct lower-entry installation into threaded wells or fittings
• Stainless steel housing and stem, 18-8 material grade for corrosion resistance
• 1.0 percent full-scale accuracy for reliable process monitoring
• No external power required — fully mechanical bimetal sensing element

Compatibility

Designed as an OEM-style replacement or new-installation dial thermometer for HVAC, plumbing, and light process piping systems requiring a bottom-connected bimetal instrument with a 9-inch stem in the 25 to 125 degrees F range.

Installation Notes

Installation is typically performed by a licensed plumber, pipefitter, or HVAC technician. Shut down the system and relieve pressure from the pipe or vessel before inserting the thermometer stem into the thermowell or fitting. Verify that the thermowell thread size and depth are compatible with the stem diameter and 9-inch length before installation. Follow applicable mechanical codes, including ASME and local piping codes, for pressure-rated installations.