Wika 31040A003G4 Bimetal Dial Thermometer 4 in Stem

Product Description

The WIKA 31040A003G4 is a bimetal dial thermometer designed for temperature measurement in HVAC, plumbing, and industrial process applications. It features a 4-inch stem with bottom-connected mounting and reads across a range of 25 to 125 degrees F (-5 to 50 degrees C). The housing and stem are constructed from 18-8 stainless steel, making it suitable for use in environments where corrosion resistance and durability are required. Accuracy is rated at plus or minus 1.0 percent of full scale. This thermometer is installed by HVAC technicians, plumbers, and mechanical contractors as part of hydronic, refrigeration, and process piping systems.

This thermometer is suited for residential and light commercial applications where surface or immersion temperature readings are needed in a pipeline or tank. The bottom-connected stem allows direct insertion into a thermowell or pipe fitting with the dial face oriented for easy panel or pipe-side reading. It is a standard replacement or new-installation instrument for hydronic heating systems, chilled water lines, domestic hot water systems, and similar low-to-moderate temperature service.

Key Features

• Temperature range of 25 to 125 degrees F (-5 to 50 degrees C) covers typical HVAC and hydronic service conditions
• 4-inch stem length provides adequate immersion depth for accurate readings in most pipe and thermowell installations
• Bottom-connected mount positions the dial face perpendicular to the stem for panel or pipe-side viewing
• 18-8 stainless steel construction resists corrosion in water, glycol, and mild process media
• 1.0 percent full-scale accuracy meets standard instrumentation requirements for HVAC and plumbing service

Compatibility

Designed as an OEM-style replacement or direct-install bimetal thermometer for residential and commercial hydronic, plumbing, and HVAC piping systems using bottom-connected thermowell or pipe-fitting connections.

Installation Notes

Installation is typically performed by a licensed plumber or HVAC technician. Shut off the system and relieve line pressure before inserting or removing the stem from any thermowell or pipe fitting. Use a thermowell when inserting into pressurized lines to allow future removal without draining the system. Verify that the fitting thread and stem diameter are compatible before installation to avoid leaks or instrument damage.