ACI A/RH-TEMP Series Relative Humidity/ Temperature Combinations
The A/RH-TEMP Series Relative Humidity transmitters, convert a resistance to a linear 4 to 20 mA, 0 to 5 VDC, or 0 to 10 VDC output. The current signal may be transmitted over long distances on unshielded twisted-pair wire and will not be affected by the lead wire resistance or electrical noise.
The Advanced Ceramic Technology design overcomes the limitations of other resistance-based humidity sensors that utilize water soluble polymer coatings. The Advanced Ceramic Technology enables these sensors to recover fully from condensation. This allows the sensor to maintain its accuracy over a longer period of time. Despite its accuracy, the Advanced Ceramic Technology sensor and related circuitry is economical.
Accuracy is maintained over the entire operating range, using a thermistor for temperature compensation. Each A/RH-TEMP Series humidity transmitter is calibrated using an NIST Traceable Temperature and Humidity Chamber.
Any ACI thermistor, RTD, or temperature transmitter may be ordered with the A/RH transmitter. All A/RH-TT Room combination units will have a board mounted on the back of the enclosure. All A/RH-Temp Series transmitters have a limited five year warranty.
• Low Drift
• Highly Repeatable
• Temperature Sensor Ouput
• Field Selectable Output Signals
• Single Point Field Calibration using DIP Switches
• Lowers Inventory Cost
Select a link under the "item" tab below to order.
| Table 1 | Table 2 |
| X | X |
| Table 1 | Configuration |
| R2 | Room |
| R2O | Room w/Override |
| R2O | Room w/Set Point* |
| R2SO | Room w/Set Point &Override* |
| D | Duct |
| O | Outdoor Air |
| SP | Stainless Plate |
| Table 2 | Temp Transmitter Output (if needed) |
| 4 | 4 to 20mA Output |
| 1 | 1-5 VDC Output |
| 2 | 2-10VDC Output |
| Supply Voltage: | 250 Ohm Load: +15 to 36 VDC / 24 VAC 500 Ohm Load: +18 to 36 VDC / 24 VAC |
|
| Power Consumption: | 1 VA max. | |
| RH Measurement Range: | 0 to 100% RH | |
| RH Output Signal: |
2-wire, 4-20mA, 3-wire 0-5 or 0-10 VDC2-Wire Resistive, or 2-wire uA Output 2-wire, 4 to 20mA, or 3-wire, 1-5, 2-10 VDC |
|
| Temperature Sensor Output: | 2-Wire Resistive, or 2-wire uA Output | |
| Temperature Transmitter Output: | 2-wire, 4 to 20mA, or 3-wire, 1-5, 2-10 VDC | |
| Accuracy @ 77oF (25oC): | +/- 1% over 20% Span between 20-95% RH +/- 2, 3, or 5% from 20 to 95% RH |
|
| Repeatability: | 0.5% RH | |
| Hysteresis: | Less than 0.4% RH | |
| Long Term Stability: | Less than 2% RH Drift / 5 Years | |
| Response Time: | 110 seconds for 63% Step | |
| Saturated Response Time: | 10 minutes for 63% Step | |
| Operating Temp. Range: | -10 to 122oF (-23.3 to 50oC) | |
| Operating RH Range: | 0 to 100% RH | |
