Tempil MRK28049 Temperature Indicators Tempilstik 371 C/700 F

The Tempil MRK28049 is a Tempilstik temperature indicator, 371°C / 700°F, 10 per case.

The obvious question about a temperature crayon is why anyone uses one when infrared thermometers exist, and the answer is worth knowing.

An infrared thermometer reads emitted radiation and converts it to a temperature using an assumed emissivity. Steel's emissivity varies enormously with surface condition — bright ground steel, mill scale, and oxidised surfaces all read differently, and a hot weld area contains all three within a few inches. Point an IR gun at shiny steel and it will read badly low, confidently.

A Tempilstik does not care. It is a physical phase change at a calibrated temperature, on the surface itself. It melts or it does not.

That is why welding procedures specify temperature indicating crayons: they are traceable, they are unaffected by surface condition, and an inspector can see the result.

At 700°F this is a high preheat, which puts it on heavy sections, high-carbon and alloy steels, and some post-weld operations.

Two technique rules: mark ahead of the heat rather than on already-hot metal, and keep the residue out of the groove — it is an inclusion waiting to happen.

Applications include welding preheat, interpass control, and heat treatment.

Brand

Tempil

SKU

MRK28049

Category

Painting & Marking Supplies

Weight

0.4 lbs

Dimensions

5.50 x 0.60 x 0.60

Price

$24.50

Availability

In stock

Rating

4.33 / 5.0