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Brass bimetal thermowell with lagging, 18 inch stem, 1/2 NPSM thread

Zoro Select

Zoro Select 24C505 Bimetal Thermowell Brass 1/2 NPSM

SKU CH-CQR2-0T543

Brass bimetal thermowell with 1/2 NPSM internal thread, 18.25 in socket length and 13 1/2 in insertion length

  • Product typeEnvironmental & Mechanical
  • Brass construction resists corrosion in harsh environments
  • 1/2 NPSM internal thread fits standard sensor connections
  • 3/4 NPT process connection mounts directly into piping
  • 18 inch stem length reaches deep process points
  • 26 inch bore diameter accommodates standard thermometer stems

Product identity

This Zoro Select 24C505 bimetal thermowell is a brass protection tube for temperature gauges in industrial process lines. It suits maintenance engineers and plant operators who need to shield a sensor stem while allowing the instrument to be removed without draining the system.

Lagging extension benefit

The 3 inch neck extension moves the gauge head away from hot insulation or pipe lagging, reducing heat transfer to the instrument and improving reading accuracy. Brass construction resists corrosion in water, steam and mild chemical service where stainless steel may not be required.

Installation checks

Verify that the process nozzle accepts a 3/4 inch NPT male thread and that the 13 1/2 inch insertion length reaches the desired measurement point. Confirm the 0.26 inch bore matches your sensor stem diameter and that the 1/2 NPSM internal thread suits the gauge connection. The component carries a California Proposition 65 warning for listed chemicals.

How it compares

Measured against everything we stock in Gauges & Tachometers, at today’s prices. Recalculated every night.

Price $76.99
Pricier than about 81% of the 193 comparable items (median $35.99).

Specifications

Product
Brand nameZORO SELECT
Product typeEnvironmental & Mechanical

Questions about this item

Will the brass thermowell with 13 1/2 in insertion length need periodic replacement due to corrosion?

Brass construction resists many process fluids, but chemical compatibility should be verified for the specific application to determine inspection intervals.

What limits continuous use of the thermowell with 0.26 in bore diameter?

The 0.26 in bore and 18.25 in socket length set the mechanical envelope; pressure and temperature ratings of the 3/4 in NPT connection govern sustained operation.

Does the 1/2 NPSM internal thread and 3 in neck extension affect heat dissipation during all-day service?

The 3 in neck extension moves the instrument away from the process, reducing conducted heat to the gauge while the brass body conducts heat evenly.

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