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WXT 535

WXT 535

Range : Rainfall, Air Pressure, Temperature, Humidity

Vaisala Weather Transmitter WXT530 series is a unique collection of cost-effective sensors that accurately and reliably measure weather conditions. They can capture any combination of wind, rain, temperature, and barometric readings in a compact, affordable package.

WXT530 models utilize solid state technologies that minimize operating and maintenance costs. Digital and analog interfaces make for easy, flexible integration, and third-party sensors can be connected to select WXT530 models to create your own weather parameter hub.

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Applications

  •  The WXT535 measures air pressure, temperature, humidity, and rainfall.
  •  Easy integration with 3rd party data collection platforms.

Features

  • Easy to change PTU module using capacitive BAROCAP® sensor for
    barometric pressure, HUMICAP® R2 sensor for humidity and resistive
    platinum sensor for air temperature.
  • Acoustic RAINCAP® sensor to measure precipitation without flooding,
    clogging, wetting, or evaporation losses.
  • Wide variety of digital communication modes for easy integration with
    most weather monitoring platforms.
  • Self-diagnostics automatically validate measurement stability.
  • Optional thermostatically controlled heaters in the transducer heads and
    arms prevent build-up of freezing rain and snow for operation in cold and
    humid environments.

Specifications

Barometric pressure measurement performance

Property Description/Value
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
Units available hPa, Pa, bar, mmHg, inHg

Air temperature measurement performance

Property Description/Value
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)
Units available °C, °F

Relative humidity measurement performance

Property Description/Value
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
PTU measuring interval 1 … 3600 s (= 60 min), at 1 s steps

Precipitation measurement performance

Property Description/Value
Collecting Area 60 cm² (9.3 in²)
Rainfall Output Resolution 0.01 mm (0.001 in)
Field Accuracy for Daily Accumulation Better than 5%, weather-dependent
Units Available mm, in
Duration Counting each 10-second increment whenever 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)
Units Available (Intensity) mm/h, in/h
Hail Output Resolution 0.1 hits/cm² (1 hits/in²), 1 hit
Units Available (Hail) hits/cm², hits/in², hits
Intensity Output Resolution (Hail) 0.1 hits/cm²h (1 hits/in²h), 1 hit/h
Units Available (Intensity – Hail) hits/cm²h, hits/in²h, hits/h


Inputs and outputs

Property Description/Value
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) 8
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
12 V ACrms: 1.1 A
17 V ACrms: 800 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
Self-diagnostic Separate supervisor message, unit/status fields to validate measurement stability
Startup Automatic, < 5 seconds from power on to the first valid output

WXT536 analog input options

Parameter Element Range Input 9 Excitation Resolution
Temperature (Pt1000) Resistor 800 … 1330 Ω 2‑wire
4‑wire		 2.5 V 16 bits
Solar radiation Thermopile 0 … 25 mV 4 MΩ – 12 bits
Voltage input Voltage 0 … 2.5 V
0 … 5 V
0 … 10 V		 > 10 kΩ – 12 bits
Tipping bucket rain gauge Frequency 0 … 100 Hz 18 kΩ 3.5 V –

WXT530 analog mA output options

Parameter Description/Value
Wind speed 0 … 20 mA or 4 … 20 mA
Wind direction 0 … 20 mA or 4 … 20 mA
Load impedance Max. 200 Ω
Update interval Max. 4 Hz

Operating environment

Property Description/Value
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 0 … 60 m/s (0 … 134 mph)
IP rating Without mounting kit: IP65 – Dust-tight. Protected from water jets from any direction.
With mounting kit: IP66 – Dust-tight. Protected from powerful water jets from any direction.

Mechanical specifications

Property Description/Value
Weight
WXT534, WXT535, WXT536 0.7 kg (1.54 lb)
WXT531, WXT532, WXT533 0.5 kg (1.1 lb)
Materials
Radiation shield, top, and bottom parts Polycarbonate +20 % fiberglass
Precipitation sensor plate Stainless steel (AISI 316)

Compliance

Property Description/Value
EU directives and regulations EMC Directive (2014/30/EU)
RoHS Directive (2011/65/EU) amended by 2015/863
Electromagnetic compatibility (EMC) 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

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