Extech 421502 J/K, Dual Input Thermometer with Alarms is a thermocouple thermometer produced by Extech company. It uses J or K type thermocouples and has a measurement accuracy of up to 0.05%.
The EXTECH 421502 is a rugged, field-use instrument featuring dual LCD displays that show temperatures for two inputs (T1, T2) or the difference between them. It supports both Type J and Type K thermocouple inputs simultaneously or individually.
Key features include relative temperature calculations, MIN/MAX/AVG readings, data hold functionality, and programmable high/low audible alarms. The unit comes complete with two Type K bead wire probes, a protective holster with a stand, and a 9V battery.
| Input Types Supported | Type J or K (dual input) |
|---|---|
| Range, Type K | -328 to 2498°F (-200 to 1370°C) |
| Range, Type J | -328 to 1922°F (-200 to 1050°C) |
| Basic Accuracy | +0.05% rdg. |
| Resolution | 0.2°F/0.1°C |
| Dimensions | 7.6 x 3.6 x 2.1" (192 x 91 x 53mm) |
| Weight | 130g (365g) |
The Type K input supports a range of -328 to 2498°F (-200 to 1370°C).
The Type J input supports a range of -328 to 1922°F (-200 to 1050°C).
The basic accuracy is +0.05% rdg.