DPM 3AS-BL 3½ Digit Backlit LCD Voltmeter Module is a low power voltage measurement module with a 200mV DC full scale measurement range, supports auto-zero and auto-polarity, can be user-selected decimal points, LED backlight can ensure excellent readability in low light conditions. The module is easy to install, and the negative rail generator enables the meter to measure a signal referenced to its own power supply GND. The design of the panel meter's housing allows the module to be low cost, which will suit high and low volume applications. The DPM 3AS-BL is intended to replace the DPM 3, DPM 3S, DPM 3-BL and DPM 3S-BL in many applications, usually requiring only minor circuit modifications.