Barometric Pressure Measurement Performance |
Observation range |
500 … 1100 hPa |
Accuracy (for sensor element) at 600 … 1100 hPa |
±0.5 hPa at 0 … +30 °C (+32 … +86 °F)
±1 hPa at −52 … +60 °C (−60 … +140 °F) |
Output resolution |
0.1 hPa / 10 Pa / 0.001 bar / 0.1 mmHg / 0.01 inHg |
Air Temperature Measurement Performance |
Observation range |
−52 … +60 °C (−60 … +140 °F) |
Accuracy (for sensor element) at +20 °C (+68 °F) |
±0.3 °C (±0.54 °F) |
Output resolution |
0.1 °C (0.1 °F) |
Relative Humidity Measurement Performance |
Observation range |
0 … 100 %RH |
Accuracy (for sensor element) |
±3 %RH at 0 … 90 %RH
±5 %RH at 90 … 100 %RH |
Output resolution |
0.1 %RH |
Wind Measurement Performance |
Wind speed |
Observation range |
0 … 60 m/s (134 mph) |
Reporting range |
0 … 75 m/s (168 mph) |
Response time |
0.25 s |
Available variables |
Average, maximum, and minimum |
Accuracy |
±3 % at 10 m/s (22 mph) |
Output resolution |
0.1 m/s (km/h, mph, knots) |
Wind direction |
Azimuth |
0 … 360° |
Response time |
0.25 s |
Available variables |
Average, maximum, and minimum |
Accuracy |
±3.0° at 10 m/s (22 mph) |
Output resolution |
1° |
Averaging time |
1 … 3600 s, sample rate 1, 2, or 4 Hz (configurable) |
Mechanical Specifications |
Weight |
WXT534, WXT535, WXT536 |
0.7 kg (1.54 lb) |
WXT531, WXT532, WXT533 |
0.5 kg (1.1 lb) |
Operating Environment |
Operating environment |
Outdoor use |
Operating temperature |
−52 … +60 °C (−60 … +140 °F) |
Storage temperature |
−60 … +70 °C (−76 … +158 °F) |
Operating humidity |
0 … 100 %RH |
Operating pressure |
500 … 1100 hPa |
Wind 1) |
0 … 60 m/s (0 … 134 mph) |
IP rating |
Without mounting kit: IP65
With mounting kit: IP66 |
1) Due to the measurement frequency used in the sonic transducers, RF interference in the 200 … 400 kHz range can disturb wind measurement. |
Precipitation Measurement Performance |
Collecting area |
60 cm2 (9.3 in2) |
Rainfall 1) |
Output resolution |
0.01 mm (0.001 in) |
Field accuracy for daily accumulation |
Better than 5 %, weather-dependent |
Duration |
Counting each 10‑second increment whenever a droplet detected |
Duration output resolution |
10 s |
Intensity |
Running 1‑minute average, 10 s steps |
Intensity observation range |
0 … 200 mm/h (0 … 7.87 in/h) (broader with reduced accuracy) |
Intensity output resolution |
0.1 mm/h (0.01 in/h) |
Hail 2) |
Output resolution |
0.1 hits/cm2 (1 hits/in2), 1 hit |
Intensity output resolution |
0.1 hits/cm2h (1 hits/in2h), 1 hit/h |
1) Cumulative accumulation after the latest automatic or manual reset.
2) Cumulative number of hits against collecting surface. |
Inputs and Outputs |
Operating voltage |
6 … 24 V DC (−10 … +30 %) |
Average power consumption |
Minimum: 0.1 mA at 12 V DC (SDI‑12 standby)
Typical: 3.5 mA at 12 V DC (typical measuring intervals)
Maximum: 15 mA at 6 V DC (constant measurement of all parameters) |
Heating voltage |
DC, AC, or full-wave rectified AC
12 … 24 V DC (−10 … +30 %)
12 … 17 V ACrms (−10 … +30 %) |
Typical heating current |
12 V DC: 800 mA, 24 V DC: 400 Ma |
Digital outputs |
SDI‑12, RS‑232, RS‑485, RS‑422 |
Communication protocols |
SDI‑12 v1.3, Modbus RTU,
ASCII automatic and polled,
NMEA 0183 v3.0 with query option |
WXT536 Analog Input Options |
Solar radiation |
0 … 25 mV |
Voltage input |
0 … 2.5 V , 0 … 5 V, 0 … 10 V |
Tipping bucket rain gauge |
0 … 100 Hz |
Temperature (Pt1000) |
800 … 1330 Ω |
WXT532 Analog mA Output Options |
When the analog output option is applied, digital communication is not available. |
Wind speed |
0 … 20 mA or 4 … 20 mA |
Wind direction |
0 … 20 mA or 4 … 20 mA |
Compliance |
EU directives and regulations |
EMC, RoHS |
EMC compatibility |
EN 61326‑1, industrial environment CISPR 32 / EN 55032, Class B |
Environmental |
IEC 60068‑2‑1, 2, 6, 14, 30, 31, 78
IEC 60529, VDA 621‑415 |
Maritime |
IEC 60945 (Exposed)
DNV GL Type Examination Certificate
No. TAA00000VF |
Compliance marks |
CE, RCM, RoHS, China RoHS, UKCA |