The HMP230 series transmitters are microprocessor based instruments for the measurement of relative humidity and temperature; from these variables they can calculate dewpoint temperature, absolute humidity, mixing ratio, wet bulb temperature and enthalpy. The transmitters have two analogue outputs and they can be connected to a serial bus via the RS 232C interface or through an RS 485/422 serial module or a current loop module. At dewpoint temperatures below 0 C, the user can select whether the transmitter calculates dewpoint or frostpoint reading; as default, the transmitter calculates dewpoint. ( HMP233 Models ~ , installation in tight places; temperatures up to +80 or +120 °C )

• Power Supply: 24VDC ( Standard), 115/230VAC
• Serial Interface: RS 232 ( standard) RS 485/422 current Loop
• Filters: Sintered filter, PPS grid with steel netting, PPS grid

**Fitted with two different cables; one is for lower temperatures up to +80 °C and the other can be used in temperatures up to +120 °C.(  One is 12.5 Feet, the other is 5.5 feet in length )