We are offering humidity controllers having following specifications: * im3700 series temperature humidity controllers are micro controller based highly versatile controllers for combined control of temperature and humidity. - controller is available with pid control algorithm. Control parameters are user configurable on site. - controllers are available which can accept input from different type of humidity sensors as well as rtd sensor for dry bulb/wet bulb measurement technique. - useful in pharmaceutical industry, environment chambers, green house rooms etc. * features: - micro controller based digital circuitry - two row four digit led display for parameter indication. - dust proof membrane keypad for programming. - input interface: pt 100 rtd for temperature. - rtd for dry/wet bulb technique or 4-20 ma from humidity sensor or 0-10 v or 0-3 v from humidity sensor. (factory set). - control algorithm independent pid - nv ram storage to retain set point in case of power failure. - control output: relay outputs rated 230v / 5a (resistive) or open collector outputs. - high low set point with relay output for compressor control. - rs 232 serial interface for pc or serial printer (optional). - real time clock (optional).