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Stainless steel dial thermometer with 3 inch glass face and 2.5 inch stem

Dwyer Instruments Inc.

Dwyer Instruments BTM32510D maximum/minimum bimetal thermometer measurement tool

SKU CH-J54S-TDTCZ

Measures 0 to 200 °F (−17.8 to 93.3 °C) with a 2.5 in stem and 3 in stainless-steel dial

  • Product typeEnvironmental & Mechanical
  • Measures 0 to 200 °F and -17.8 to 93.3 °C for wide-range monitoring
  • 5 in stem reaches into ducts and pipes without extra fittings
  • 3 in dial provides clear, readable graduations at a glance
  • 1/2 in NPT back connection threads directly into standard ports
  • Stainless-steel housing with glass lens resists corrosion and impact in harsh environments

Thermometer with NIST certificate

The Dwyer Instruments BTM32510D is a bimetal dial thermometer built for environmental and mechanical measurement. It provides direct temperature readings in both Fahrenheit and Celsius without requiring external power. The unit ships new and includes a NIST-traceable certificate for documented accuracy.

Suited for fixed-mount monitoring

This model suits technicians who need a permanent, stem-mounted sensor with a 2.5 in insertion depth and 1/2 in NPT back connection. The 3 in dial and glass lens allow clear local reading in industrial or HVAC settings. It is not for applications requiring remote signalling, data logging, or a shorter stem length than the fixed 2.5 in probe.

Dual-scale range defines fit

The single specification that decides suitability is the 0 to 200 °F and -17.8 to 93.3 °C measurement span. Processes operating outside these limits need a different instrument, while operations within the span can use this thermometer directly.

How it compares

Measured against everything we stock in Meters, Testers & Measuring Tools, at today’s prices. Recalculated every night.

Price $82.99
Pricier than about 60% of the 3,030 comparable items (median $54.99).

Specifications

Product
Brand nameDWYER INSTRUMENTS
Product typeEnvironmental & Mechanical

Questions about this item

What comes with the BTM32510D thermometer and do I need to buy anything else to mount it?

The thermometer has a 2.5 in stem with a 1/2 in NPT back connection so it threads directly into a matching fitting; no extra mounting hardware is included.

Should I choose the Fahrenheit or Celsius scale on the 3 in dial for my application?

The dial shows both scales together — 0 to 200 Degrees F and -17.8 to 93.3 Degrees C — so you read whichever unit you prefer without selecting a version.

What does the 200 degree top end mean when the probe is installed in a live pipe?

It indicates the maximum temperature the bimetal element can register; sustained exposure above 200 Degrees F can damage the instrument.

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