ClimaVue 40

Compact, Digital, RS-485 Modbus Weather Sensor
ClimaVue 40

ClimaVue 40

Orderable

Compact, Digital, RS-485 Modbus Weather Sensor

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Model:
ClimaVue 40
Item Number:
42739
Warranty:
2 years

Overview

The ClimaVue™40 is an all-in-one meteorological sensor designed for solar plant operational monitoring and solar resource assessment with IEC 61724-1 compliance. Campbell Scientific is well known for creating accurate and reliable instruments. We recognize that ease of operation and overall cost of operation are critical. With the ClimaVue 40, you will get this and more. In adherence to IEC 61724-1 (2021), the ClimaVue 40 provides ambient air temperature, barometric pressure, precipitation, relative humidity, wind direction, and wind speed measurements. The sensor also offers vapor pressure, tilt, lightning strike, and lightning average distance measurements. 

Key Advantages

All-in-One Weather Sensor with IEC 61724-1 Compliance
Purpose built to perform and survive the extreme conditions of PV Sites

Technical Description

Sensors

All sensors are integrated into a single, small form-factor unit, requiring minimal installation effort. With a robust, limited-moving-parts design that prevents errors because of wear or fouling, the ClimaVue 40 is ideal for long-term installations.

Anemometer

The space underneath the rain gage is where the ClimaVue 40 measures wind speed. Ultrasonic signals emitted from transducers at right angles to each other bounce off the porous, sintered glass plate and back up to the opposite sensor. The speed of sound is affected by the wind, and the wind speed is calculated by measuring differences in the time it takes for sound to travel from the transmitters to the receivers.

Temperature Sensor

Like the ClimaVue 50, the ClimaVue 40 temperature measurement is made in the center of the anemometer area where a small, stainless-steel needle containing a miniscule temperature sensor extends from the middle of the four sonic transducers.

The temperature sensor is protected from direct sunlight by the sensor body and allows air to freely flow through the region. Any temperature sensor thus mounted (including those in non-aspirated radiation shields) exhibits a bias in temperature measurement due to solar loading of the mounting structure. An energy balance equation can be used to calculate a correction for this bias based on wind speed and solar radiation. This correction can be applied when a ClimaVue 40 is used with a Campbell Scientific data logger or when this sensor is included in one of our standard system offerings, such as the SunScout.

Relative Humidity Sensor

The relative humidity sensor on the ClimaVue 40 is located behind the circular Teflon screen close to the sonic transducers. The Teflon screen protects the sensor from liquid water and dust while allowing water vapor to freely pass to the sensor. The ClimaVue 40 measures relative humidity and temperature and computes vapor pressure.

Drip/Tipping Counter Precipitation Gage

The ClimaVue 40 contains a 9.31 cm (3.67 in.) diameter rain-collection funnel. A spring in the funnel acts as a filter to keep out large particles while allowing enough flow so water does not back up. Rain collected by the funnel exits the funnel through a precision-flared hole that forms the rain into drops of a known size. The falling drops hit and momentarily bridge the gap between two gold pins, creating an electrical pulse.

After passing the drop counter, the drops land in a tipping spoon reservoir for a secondary precipitation measurement. This secondary measurement method extends the measurement range to capture extreme rainfall events of up to 1,500 mm/hr.

Tilt Sensor

The ClimaVue 40 is also equipped with a tilt sensor. The primary use of the tilt sensor data is to ensure the ClimaVue 40 remains level at all times. Campbell Scientific recommends regularly checking X and Y tilt data to ensure the ClimaVue 40 is level. If it has tilted, return to the site and level it again. Three degrees off level can cause errors in the rain and solar radiation measurements. Although this sensor's readings may be used to level the instrument during installation, it is much easier to use the small bubble level on the bottom of the anemometer plate.

Benefits

  • Built extra tough for long-life and accuracy in harsh PV installation environments.
  • IEC 61000-4-5 Industrial level surge protection
  • Due to its elegant design, the ClimaVue 40 is the most cost-effective of any IEC 61724-1 rated all-in-one weather sensor on the market.
  • RS-485 Modbus RTU for easy integration with any logger, SCADA, or other third-party monitoring systems.
  • Integrated precipitation gauge with dual-sensors for increased accuracy.
  • Corrected air temperature accuracy equivalent to a fan-aspirated shield without using louvres or drawing any power.
  • Easy installation with convenient detachable cable and integrated leveling fixture.
  • Internal tilt sensor for easy remote orientation checks.
  • Made in the USA and backed by Campbell Scientific’s legendary quality and support.

Specifications

Measurements Made
Air temperature, precipitation, relative humidity, and wind direction and speed.
Measurement Scan Rate
1 s
Input Supply Voltage
9 to 32 Vdc

(continuous)

Operating Temperature Range
-50° to +60°C
Average Current Drain @ 12 Vdc
6 mA
Communications
RS-485 Modbus
Connector
M12 five pin
Ingress Protection
The ClimaVue 40 is intended for year-round, unattended outdoor use in meteorological and environmental monitoring applications. It tolerates continuous exposure to wind, heavy rain, dust, and solar radiation. When installed properly, the instrument housing provides environmental protection functionally equivalent to an IP65 rating, though no official certification is claimed. This device should not be subjected to high-pressure water streams, submersion in liquid, or corrosive gases.
Application of Council Directive(s)
2014/30/EU: Electromagnetic Compatibility Directive

(EMC)

2011/65/EU: Restrictions of Hazardous Substances Directive

(RoHS2)

2015/863/EU: Amending Annex II of RoHS Directive 2011/65/EU: Phthalates Restrictions

(EU)

Standards to Which Conformity Is Declared
EN 61326-1:2013: Electrical equipment for measurement, control, and laboratory use—EMC requirements—for use in industrial locations
EN 63000:2018: Technical documentation for the assessment of electrical and electronic products with respect to the restriction of hazardous substances
Diameter
10 cm

(4 in.) including rain gage funnel

Height
34 cm

(13.4 in.) including rain gage funnel

Precipitation

Range
0 to 1,500 mm/h
Resolution
0.017 mm
Uncertainty
±5% of measurement

(from 0 to 1,000 mm/h)

Vapor Pressure

Range
0 to 47 kPa
Resolution
0.01 kPa
Uncertainty
Varies with temperature and humidity

Air Temperature

Range
-50° to +60°C
Resolution
0.1°C
Sensor Uncertainty
±0.2°C at 25°C
Measurement Uncertainty
±0.6°C from -20° to +50°C

Relative Humidity

Measurement Range
0 to 100%
Resolution
0.1
Uncertainty
±3% RH typical

(varies with temperature and humidity)

Barometric Pressure

Range
1 to 120 kPa
Resolution
0.01 kPa
Uncertainty
±0.05 kPa at 25°C
Equilibration
< 10 ms
Long-Term Drift
< 0.1 kPa/year, typical

Horizontal Wind Speed

Range
0 to 60 m/s
Resolution
0.01 m/s
Uncertainty
0.3 m/s or 6% of measurement, whichever is greater

Wind Gust

Range
0 to 60 m/s
Resolution
0.01 m/s
Uncertainty
0.3 m/s or 6% of measurement, whichever is greater

Wind Direction

Range
0° to 359°
Resolution
1°
Uncertainty
±5°

Tilt

Range
0° to 180°
Resolution
0.1°
Uncertainty
±1°

Lightning Strike Count

Range
0 to 65,535 strikes
Resolution
1 strike
Uncertainty
> 25% detection at < 10 km typical

(variable with distance)

Lightning Average Distance

Range
0 to 40 km
Resolution
3 km
Uncertainty
Variable

Common Accessories

(8)

Ships With

(2)
  • ClimaVue 40 Quick Deploy Guide
  • Calibration Sheet

Compatibility

Compatible Products

(2)

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