ACI A/RH Series Relative Humidity Transmitters
The A/RH Series Relative Humidity transmitters, convert a resistance change 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 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 also allows the sensor to maintain its accuracy over a longer period of time. Despite its high 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 Series humidity transmitter is calibrated using a NIST Traceable Temperature /Humidity Chamber. Both three and five point calibration certificates are a vailable for 1% and 2% RH accuracies but they must be ordered separately.
All A/RH Series transmitters have a limited five year warranty.
• Single point Field Calibration
• Field selectable output signals
• 1%, 2%, 3%, and 5% Accuracies
• Low Drift
• Highly Repeatable
• Calibration Certificates Available Applications:
• Building Automation Systems
• Light Industrial
• Pharmaceutical
• Humidity Chambers
• Data acquisition
• OEM
Select a link under the "item" tab below to order.
| Table 1 | Table 2 | Table 3 |
| X | XXX | X |
| Table 1 | Accuracy |
| RH1 | +/- 1% |
| RH2 | +/- 2% |
| RH3 | +/- 3% |
| RH5 | +/- 5% |
| 3 PT NIST Certificate | 3 point Calibration Certificate @ 20, 50 and 80% RH |
| 5 PT NIST Certificate | 5 point Calibration Certificate w/standard points choosen by ACI |
| Table 2 | Range if 1% |
| 20% 40-60% | Please Specify a 20% Span (i.e. 40-60%) |
| Table 3 | Configuration |
| R | Room |
| D | Duct |
| O | Outdoor Air |
| SP | Stainless Plate |
| Supply Voltage: | 250 Ohm Load: +15 to 36 VDC / 21.6-26.4 VAC 0-5VDC: +15-36 VDC / 21.6-26.4 VAC 500 Ohm Load: +18 to 36 VDC / 21.6-26.4 VAC 0-10VDC: +18-36 VDC / 21.6-26.4 VAC |
|
| Power Consumption: | 1 VA max. | |
| RH Measurement Range: | 0 to 100% | |
| RH Output: | 2-wire, 4 to 20mA (Factory Standard) 3-wire, 0-5, 0-10 VDC or 4 to 20mA |
|
| Accuracy @ 77oF: | +/- 1% over 20% span (between 20 to 90%) +/- 2%, 3%, or 5% from 20 to 95% |
|
| Long Term Stability: | Less than 2% drift / 5 years | |
| Hysteresis: | Less than 0.4% RH | |
| Repeatablity: | 0.5% RH | |
| Sensitivity: | 0.1 % RH | |
| Response Time: | 110 seconds for 63% Step | |
| Operating Temperature Range: | -10 to 122oF (-23.3 to 50oC) | |
| Operating Humidity Range: | 0 to 95 % RH non-condensing | |
| Saturation Response Time: | 10 minutes for 63% Step | |
