Müller Industrie-Elektronik launches a family of robust process calibrators for usage in harsh environments. These calibrators are offered as compact instruments type PC-HA as well as multifunction device PC-MF. They are battery operated with a continuous operating time of approximately 12 hours at 10 mA and can be used in ambient temperatures between 0 and 50 ° C at humidity of max 80% RH. These calibrators cover all measuring ranges and output sources like, voltage, current, resistor, frequency, thermocouple, resistance thermometer, pulse and pressure. The measurement and source function can be operated simultaneously. All device cases are made of sturdy plastic in a shock-resistant hard rubber protective covering.