Dwyer Instruments 3rbm25 Bimetal Thermometer 0-250F 3in Dial

Product Description

The DWYER INSTRUMENTS 3rbm25 is a bimetal dial thermometer designed for temperature measurement in HVAC, plumbing, and industrial process applications. It features a 3 inch dial face with a 0 to 250 degrees F range and a 2.5 inch stem for insertion into pipes or vessels. The back-mount configuration positions the dial face perpendicular to the pipe, keeping it readable when installed in tight or inline locations. The stainless steel case protects internal components from moisture and corrosion in mechanical room and plant environments. Licensed HVAC technicians and plumbers are the primary installers of this type of instrument.

This thermometer suits residential and light commercial HVAC systems, hydronic heating loops, domestic hot water lines, and process piping where a permanent, direct-reading temperature indicator is needed. The 0.5 inch MPT back-mount connection threads directly into a standard tee, well fitting, or pipe boss. The 0 to 250 degrees F range covers typical hot water supply and return temperatures as well as low-pressure steam and condensate applications.

Key Features

• 0 to 250 degrees F bimetal sensing range suitable for hot water and low-pressure steam service
• 3 inch dial face for clear reading at typical mechanical room distances
• 2.5 inch stem length for adequate immersion depth in standard pipe sizes
• 0.5 inch MPT back-mount connection for inline pipe installation
• Stainless steel case for corrosion resistance in wet mechanical environments

Compatibility

Designed as an OEM-style replacement or new-installation bimetal thermometer for residential and commercial HVAC, hydronic heating, and plumbing piping systems using a standard 0.5 inch female NPT fitting or thermowell.

Installation Notes

Installation is performed by licensed plumbers or HVAC technicians in accordance with local mechanical codes and ASME B31.9 building services piping guidelines where applicable. Shut down and depressurize the piping system before threading the instrument into the fitting or thermowell. Apply an appropriate thread sealant or PTFE tape to the male threads before installation. Do not overtighten the connection, and never install or remove the thermometer while the line is pressurized or at operating temperature.

Technical Specifications

• Temperature Range: 0 to 250 degrees F
• Dial Size: 3 inches
• Stem Length: 2.5 inches
• Connection Size: 0.5 inch MPT
• Mount Type: Back Mount
• Sensor Type: Bimetal
• Case Material: Stainless Steel

Standard Information

• Brand: DWYER INSTRUMENTS
• Manufacturer Part Number: 3rbm25