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72 inch stainless steel bimetal thermometer with 3 inch glass dial and 1/2 NPT back connection

Dwyer Instruments Inc.

Dwyer Instruments BTLRN372101 72 in bimetal thermometer 0 to 200 F

SKU CH-4MMX-9N13V

Measures 0 to 200 °F with a 72-inch stainless-steel stem and 3-inch glass dial

  • TypeEnvironmental & Mechanical
  • 72-inch stem reaches deep into tanks or ducts
  • 0 to 200 °F range covers common industrial processes
  • 3-inch dial with glass lens gives clear readings
  • Stainless-steel housing and 1/2 in NPT back connection resist corrosion
  • Bimetal sensing element needs no external power

Long-reach bimetal thermometer

The Dwyer Instruments BTLRN372101 is a 72-inch stem dial thermometer built for industrial temperature measurement. Its stainless-steel housing and glass lens suit process piping, tanks and ductwork where a rigid, corrosion-resistant probe is required. The 3-inch dial provides clear local indication without external power.

Sustained-load behaviour

The bimetal sensing element responds directly to temperature changes along the full stem length, delivering continuous indication during extended process runs. No electronics or batteries are present, so drift from component ageing or power interruption does not occur. The 1/2-inch NPT back connection maintains a secure, leak-tight seal under prolonged thermal cycling.

Deciding specification

The fixed temperature range of 0 to 200 degrees F determines whether this thermometer matches the process limits. Applications that exceed 200 degrees F or require sub-zero measurement cannot use this model. Buyers needing a wider or different span must select an alternative range.

Highlights

  • 72-inch stem reaches deep into tanks or ducts
  • 0 to 200 °F range covers common industrial processes
  • 3-inch dial with glass lens gives clear readings
  • Stainless-steel housing and 1/2 in NPT back connection resist corrosion
  • Bimetal sensing element needs no external power

Specifications

BrandDWYER INSTRUMENTS
TypeEnvironmental & Mechanical

Questions about this item

Does the 72-inch stem get hot enough to affect nearby equipment during all-day use?

The bimetal sensing element is at the stem tip, so only the immersed portion reaches process temperature; the dial housing stays near ambient.

What fitting must my pipe or tank already have for the 1/2-inch NPT connection?

A female 1/2-inch NPT threaded port is required; the thermometer screws directly into that opening.

Will the 3-inch dial be readable next to older panel gauges with smaller faces?

The 3-inch glass-faced dial provides larger numerals than many legacy 2-inch gauges, improving side-by-side legibility.

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