Pocket-Probe Accutherm Analog Pyrometer. A Pocket-Probe Pyrometer made by Electronic Development Laboratories (EDL) is a handheld, portable device used to measure surface temperatures quickly and accurately through direct physical contact. What It Does Measures Contact Temperature: Unlike non-contact infrared pyrometers that read thermal radiation from afar, the Pocket-Probe uses physical sensor tips and thermocouples placed directly against a surface to take a reading. Operates in Hazardous Zones: Certain legacy and analog models (like the analog Pocket-Probe) require no batteries and generate their own millivoltage via a built-in thermopile or thermocouple system, making them completely spark-free and safe for explosive environments, power plants, and mines. Delivers Fast Field Readings: Digital and industrial versions plug in specialized sensor tips to record precise measurements with high resolution, often featuring peak-hold memory to store the highest temperature measured during a test.