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M2 Series Specifications
| PROBE | M22 | M23 |
| Probe type | HygroClip S | |
| Humidity sensor | ROTRONIC C94 thin film capacitive | |
| Temperature sensor | Pt100 RTD | |
| Operating limits | 0...100%RH -40...85°C / -40...185°F |
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| Repeatability | better than 0.5%RH and 0.1°C/°F | |
| Humidity sensor stability | better than 1% RH per year | |
| Sensor protection | type D15G, stainless steel wire mesh, PPS frame | |
| Probe material | Polycarbonate | |
| TRANSMITTER | M22 | M23 |
| Circuit type | 2-wire loop-powered | 3-wire |
| Signal type | 4...20 mA | 0...20
mA, 4...20 mA 0...1V, 0...5V, 0...10V (user selectable) |
| Measuring range | 0...100%
RH 0...100°F (other ranges are available) |
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| System accuracy at 23°C | ± 1.5% RH / ± 0.3°C (± 0.5°F) | |
| Operating limits | 0...99%
RH non condensing -40...60°C (-40...140°F) -30...60°C (-22...140°F) with optional display |
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| Power supply | 10...28
VDC, 10 + 0.02 x load 2 x 20 mA |
15...35
VDC (65 mA) or 12...24 VAC |
| Maximum load for current outputs | 250 Ohm | |
| Minimum load for voltage outputs | n/a | 1000 Ohm |
| User configurable output signals | n/a | output
scale and temperature unit configurable with the HW3 software output signal type (current or voltage) configurable with solder pads |
| Display option | No | Yes LC, 2 line numeric 1 line alphanumeric 1/4 character height, resolution 0.1 |
| Electrical connections | Cable grip and terminals | |
| Housing material | ABS | |
| Protection grade | IP65/NEMA4 | |
| Housing dimensions w/o probe | 154 x 72.5 x 48 mm (6.06 x 2.86 x 1.89") | |
| Weight | 300 g / 0.7 lb | |
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