HS Element Digitally profiled thin-film capacitive (32 bit mathematics) U.S. Patent 5844138 Accuracy at 25°C from 10-80% RH* ±1%; multi-point calibration NIST traceableReset Rate** 24 hoursStability ±1% @ 20°C (68°F) annually for two years Operating Humidity Range 0 to 100% RH (non-condensing)Hysteresis 1.5% typicalLinearity Included in accuracy spec.Temperature Effect ±0.1% RH/°C above or below 25°C (typical)Analog Output 4-20 mA 2-wire polarity insensitive (clipped and capped)Scaling 0-100% RHOperating Temperature Range -40° to 50°C (-40° to 122°F) Input Power*** loop powered 12-30VDC only 30mA max.Temperature Transmitter Output Digital 4-20mA (clipped and capped) or 0-5V/0-10V output; transmitter accuracy: ±0.5°C (1.0°F) typicalEMC Conformance CE Option EN 50081-1 EN 50082-1 EN 61000-4-4 EN 61000-4-5 EN 61000-4-3 ENV 50204 EN 61000-4-6 *Specified accuracy with 24VDC supplied power with rising humidity.**Reset Rate is the time required to recover to 50% RH after exposure to 90% RH for 24 hours.***One side of transformer secondary is connected to signal common so an Isolation transformer or dedicated power supply may be required.Shielded cabling is required for conformance to EMC standards.