The SL7000 loggers have a combination of up to 4 universal inputs, each can accept; RTD / Pt100, Thermocouple (Types J, K, T, R, S, B, N), mA (4-20mA 4/20mA) Volts, mV, Thermistors, Slidewire, Cu and Ni. All SL7000 data loggers have an internal temperature sensor digital input which can be used as a trigger to start logging or as a pulse counter for interfacing with flowmeters or other sensors with a pulse output. An optional internal relative humidity sensor is available as well as an optional external sensor. A total of 9 channels (internal temp, internal pulse counter, internal RH, external temp & RH and either 2 or 4 universal inputs.