esm-xx00 (esm-4400, esm-4900, esm-7700, esm-9900 series) series process indicators are designed for measuring temperature and any process value. They can be used in many applications with their universal process input, alarm functions and serial communication unit. They are mainly used in glass, plastic, petro-chemistry, textile, automotive and machine production industries.
in our esm-xx00 series there are 4 types of controllers. The only difference is their sizes.
however, esm-3700 is basic and only single set process indicator.
you may prefer to use viewer data logging software with esm-4400, esm-4900, esm-7700, esm-9900 series of devices.