| Property | Description/Value |
|---|---|
| Sensor |
Vaisala DRYCAP® 180U Thin-film capacitive polymer sensor |
| Recommended calibration interval | 2 years |
| Dew point temperature 1 | |
| Measurement range | −80 … −20 °C (−112 … −4 °F) Td |
| Accuracy | |
| −80 … −40 °C (−112 … −40 °F) | ±2 °C (3.6 °F) Td |
| −40 … −20 °C (−40 … −4 °F) | ±3 °C (5.4 °F) Td |
| Non-calibrated range | −100 … +20 °C (−148 … +68 °F) Td |
| Typical response time 63 % [90 %] at a gas temperature of +20 °C (+68 °F) and pressure of 1 bar: | |
| −20 … −80 °C Td | 0.5 min [7.5 min] |
| −80 … −20 °C Td | 2 s [5 s] |
| Typical long-term stability | Better than 2 °C (3.6 °F) / year |
| Analog output scalings | |
| Option 1 | −80 … +20 °C (−112 … +68 °F) Td |
| Option 2 | −100 … 0 °C (−148 … +32 °F) Td |
| Option 3 | Free scaling |
| Concentration by volume (ppm) | |
| Measurement range (typical) | 0 … 500 ppm |
| Accuracy at +20 °C (+68 °F), 1013 mbar | ±(0.2 ppm + 20 % of reading) |
| Property | Description/Value |
|---|---|
| Temperature | −40 … +70 °C (−40 … +158 °F) |
| Relative humidity | 0 … 100 %RH (up to +20 °C / +68 °F) |
| Pressure | 0 … 50 bar (725 psia) |
| Measurement environment |
For air, nitrogen, argon, helium, and oxygen 2 Not suitable for measurements in hydrogen or pure carbon dioxide |
| Sample flow rate | No effect on measurement accuracy |
| EMC compliance |
EN61326-1, Industrial environment
|
| Property | Description/Value |
|---|---|
| Two analog outputs (scalable) | 4 … 20 mA, 0 … 20 mA (3-wire) 0 … 5 V, 0 … 10 V |
| Digital output | RS-485 (2-wire) |
| Alarm-level indication by analog signal | User selectable |
| Purge information | 5 V, 10 V, 20 mA, or LED |
| Accuracy of analog outputs | ±0.01 V / ±0.01 mA |
| ON/OFF output available instead of 2nd analog output | |
| Purge inactive | 0 V or 4 mA |
| Purge active | 5 V, 10 V, or 20 mA |
| OR exceeded Td or ppm limit | User selectable |
| Typical temperature dependence | |
| Voltage output | ±0.001 % of span / °C |
| Current output | ±0.005 % of span / °C |
| Operating voltage | |
| RS-485 output | 11 … 28 VDC 3 |
| Voltage output | 15 … 28 VDC 3 |
| Current output | 21 … 28 VDC |
| Supply current | |
| Normal measurement | 20 mA + load current |
| During self-diagnostics | Max. 220 mA pulsed |
| Supply voltage fluctuation | Max. 0.3 V |
| External load | |
| Voltage output | Min. 10 kΩ |
| Current output | Max. 500 Ω |
| Property | Description/Value |
|---|---|
| Housing material (wetted parts) | AISI316L |
| Stainless steel mesh filter | Filter body AISI303, mesh AISI316L, grade 18 μm |
| Mechanical connections | ISO G1/2", NPT 1/2", UNF 3/4"- 16", UNF 5/8"-18" |
| IP rating | IP66 |
| Storage temperature range | −40 … +80 °C (−40 … +176 °F) |
| Weight with different thread options |
ISO thread: 190 g (6.70 oz) NPT thread: 210 g (7.41 oz) UNF thread: 186 g (6.56 oz) |
| Property | Specification |
|---|---|
| Connector | Straight, moulded M8 female (IEC 60947-5-2) |
| Color | Black |
| Number of contacts | 4 |
| Conductors | 0.25 mm2 (× 4) / 0.00039 inch2 (× 4) |
| Insulation | PVC |
| Cable diameter | 5.0 mm / 0.2 in |
| Protection class | IP67 / NEMA 4 |
| Wire color code | EN50044 |
1 When the dew point is below 0 °C, the transmitter outputs frost point for Td.
2 Consult Vaisala if other chemicals are present. Consider safety
regulations with flammable gases.
3 For extended temp. down to −40 °C (−40 °F) or pressure up to 50 bar (725 psia), the supply voltage is 21 … 28 VDC.