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Transparent 5 inch dial bimetal thermostat with stainless steel housing and glass lens

Zoro Select

Zoro Select 1NGD5 Bimetal Thermostat 5 in Dial 0 to 250F

SKU CH-TSS6-302EP

A bimetal thermostat with a 5 in dial measuring 0 to 250 °F and –20 to 120 °C

  • Product colorTransparent
  • Wide temperature range 0 to 250 °F
  • Dual-scale dial shows °F and °C
  • Stainless steel housing resists corrosion
  • Glass lens protects the dial face
  • 1/2 in NPT bottom connection for easy install

Industrial Temperature Monitoring

The Zoro Select 1NGD5 bimetal thermostat provides direct temperature readings for HVAC and industrial systems. Its 5-inch dial displays a range of 0 to 250 degrees Fahrenheit and -20 to 120 degrees Celsius. The 6-inch stem connects via a 1/2 inch NPT bottom fitting for secure installation in pipelines or tanks.

Passive Thermal Operation

The bimetal sensing element requires no external power supply, eliminating electrical noise and standby consumption. Stainless steel housing and a glass lens protect the mechanism from corrosion and physical impact in harsh environments. This passive design ensures continuous operation without thermal drift or electronic failure points.

Traceable Calibration Included

Each unit ships with a NIST-traceable calibration certificate, removing the need for separate verification before commissioning. The transparent dial face allows clear reading from multiple angles in low-light conditions. No additional mounting hardware or configuration software is supplied or required for standard use.

How it compares

Measured against everything we stock in Thermostats & Thermostat Accessories, at today’s prices. Recalculated every night.

Price $32.99
Cheaper than about 73% of the 286 comparable items (median $78.49).

Specifications

Product
Brand nameZORO SELECT
Product colorTransparent

Questions about this item

How do I install the 1/2 in NPT bottom connection without cross-threading?

Thread the 1/2 in NPT fitting into the process port by hand until snug, then tighten one turn with a wrench on the stainless-steel housing flats — never force the glass lens or 5 in dial.

What part will need replacement first on the 0 to 250F bimetal thermometer?

The glass lens can crack from thermal shock or impact; the bimetal coil itself is sealed and not field-serviceable, so the whole unit is replaced if calibration drifts.

At what point does the 6 in stem stop reading accurately during sustained high-temperature use?

Continuous exposure near 250F may cause gradual calibration drift in the bimetal element; the included NIST-traceable certificate documents initial accuracy only.

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