We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Dwyer long-reach bimetal thermometer with 18-inch stainless stem and 3-inch glass dial

Dwyer Instruments Inc.

Dwyer Instruments BTLRN318101 Long reach bimetal thermometer 18 in stem 0 to 200 F measurement tool

SKU CH-9D73-ZSVCW

Long-reach bimetal thermometer with an 18 in stem measures 0 to 200 F and includes a NIST-traceable certificate

  • Product typeEnvironmental & Mechanical
  • Long reach with 18 in stem for deep access
  • Wide temperature range 0 to 200 F covers many applications
  • Clear 3 in dial diameter for easy reading
  • Durable stainless steel housing resists corrosion
  • Glass lens protects dial from damage

Long-reach bimetal thermometer

The Dwyer Instruments BTLRN318101 uses an 18 in stem to place the sensing element deep inside ducts, tanks or process lines. A 3 in dial shows temperatures from 0 to 200 degrees Fahrenheit. Stainless-steel housing and a glass lens protect the mechanism in industrial environments.

Thermals and power draw

Bimetal operation requires no external power, so the instrument adds zero heat and draws no current. The stainless-steel stem conducts process temperature to the coil without electronic self-heating. Silent mechanical movement eliminates fan or pump noise entirely.

Sustained-load behaviour

Continuous immersion at the upper end of the 0 to 200 degrees Fahrenheit range does not degrade calibration because the bimetal element is rated for the full scale. The included NIST-traceable certificate documents initial accuracy. The 1/2 in NPT back connection maintains a secure seal during prolonged service.

How it compares

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

Price $81.99
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

How do I install the 18-inch stem with the 1/2 in NPT back connection, and what step is often missed?

Thread the 1/2 in NPT back connection into the process fitting using pipe sealant on the threads; the step often missed is ensuring the 18-inch stem reaches the measurement zone without bottoming out against the vessel wall.

What maintenance or replacement will the bimetal thermometer need over time?

Periodically verify the 0 to 200 F dial accuracy against a known reference; if the pointer drifts or the glass lens cracks, replace the entire unit because the bimetal element and NIST-traceable certificate are not field-serviceable.

What limit appears first during sustained use at the top of the 200 F range?

Continuous exposure near 200 F can accelerate bimetal fatigue, causing gradual calibration drift before the stainless steel housing or glass lens shows any degradation.

More in Meters, Testers & Measuring Tools

Similar items