The EMT 1900 is a LCD Digital Panel Meter with 4 measurement ranges. The module can measure ambient temperature via a built-in sensor and outside temperature via an external sensor (not supplied). It uses NTC temperature sensors to ensure high accuracy over a wide temperature range. The module is fitted to the panel by locating its screw threaded stud through the hole, fitting the washer and tightening the nut provided. A rubber seal is included, providing splash-proof protection for the unit when fitted to the meter during installation.