The GS32H is very small size, only 18.5X34.6mm. (More smaller, on request) The GS32H with HART protocol can handle more than 20 different gases, convert the gas sensor signal into a standard 4-20mA output. The GS32H is protected against miswiring and transient overvoltages. Extremely compact construction Input: all of toxic and electrochemical gas sensors Output: 4...20mA Non-recalibration,plug and measure Configuration using PC or PDA Temperature and non-linearity compensation