Relative Humidity & Ambient Temperature Sensor – 3S-RH&AT
The SEVEN Relative Humidity & Ambient Temperature Sensor is specifically designed to measure relative humidity and ambient temperature, with an optional pressure measurement feature.
The sensor is supplied with mounting facility, and protected from direct sunlight & radiations by a plastic radiation shield with four aspirated plates that allow the air to pass freely.
3S-RH&AT are sensors that measure the humidity and temperature of the air. Relative Humidity Sensors are used for estimating spectral variations that can impact the solar plant’s performance. According to IEC61724-1:2021, measurements of relative humidity can be used to determine changes in incidence spectrum that could impact the power output of PV modules and the readings from irradiance sensors. Furthermore, the temperature and pressure of the surrounding air affect how much moisture it can contain. As a result, the main determinant of relative humidity is ambient temperature. The impacts of relative humidity on solar power plants include increased heat transfer from the cell surface and refraction of incoming sunlight. Last but not least, the times of wetness due to condensation can also be calculated by combining humidity data and ambient temperature data. All of these reasons show the impact of relative humidity and ambient temperature sensors on the performance of photovoltaic systems.
What is the working principle of Relative Humidity and Ambient Temperature sensor?
For a more precise assessment of the surrounding humidity, the Relative Humidity Sensor has a UV-resistant protective shield. The transmitter within is shielded by this. More precisely, the 3S-RH&AT measures ambient temperature and relative humidity using a measuring transmitter with an I²C output. With a 7-pin connector, it can be linked to SEVEN Irradiance Sensor or Sensor Box types. Additionally, dataloggers and other receiving devices can be directly attached to it.
Technical Specifications of Relative Humidity and Ambient Temperature Sensor
| Item Code | 3S-RH&AT |
| Measured Data | Relative Humidity and Ambient Temperature |
| Sensor Type | Capacitive |
| RH Range | 0% to 100% |
| RH Accuracy | ±1% RH (20 … 70%) at 25 °C |
| RH Resolution | 0.1% |
| T Range | -40°C to +85°C |
| T Accuracy | ±0.1% °C at (5 … 60 °C) |
| T Resolution | 0.1°C |
| Data Output | I²C |
| Power Supply | 3 V DC |
| Electrical Connection | 3 m LIYYC11Y PUR Cable, UV and Weather Resistant |
| Operating Temperature Range | -40°C to +85°C |
| Shield Dimensions | Ø 105 x 100 mm |
| Weight | 0,2 kg |
| IP Rating | IP 65 |
| Sensor Housing Material | Stainless Steel Tube – Membrane Filter |
| Shield Material | ABS |
| Standard |
Class A according to IEC 60751:2022 (Temperature)
Class A according to IEC 61724-1:2021 (Relative Humidity)
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Where is RH&AT used?
- Solar energy systems,
- Industrial areas,
- Production facilities,
- Storage areas,
- Assessing conditions in transportation vehicles,
- Controlling humidity to protect moisture-sensitive products and equipment.
How to install Relative Humidity and Ambient Temperature Sensor?
Before installation, it is advised that the system be run at ground level to ensure that every part is functioning as it should.
The sensor should be positioned away from any dark, reflective, or heat-absorbing objects in order to choose the best spot. It is preferable to mount the product on the building’s side that faces the direction of the predominant wind when it is to be installed on a rooftop. Additionally, the sensor should not be placed next to any heat sources, such as vents or chimneys.
Installing a sensor can be done in two phases. First, the mounting structure for the ambient temperature and relative humidity sensors needs to be put in place. After that, the sensors need to be fastened to the mounting framework.
Why Choose Seven Relative Humidity and Ambient Temperature Sensor?
- High Accuracy: Provides accurate wind direction data with little variation, guaranteeing the data’s dependability.
- Weather Resistance: Perfect for outdoor use, the plastic structure guarantees resistance to corrosion, UV deterioration, and other environmental influences.
- Shield: The device comes with a UV-resistant shield that protects the relative humidity and temperature sensors.
Frequently Asked Questions (FAQ)
1- What is the Class?
All 3S-RH&AT sensors are Class A according to IEC 60751:2022 (Temperature) and Class A according to IEC 61724-1:2021 (Relative Humidity)
2- What is the warranty?
All 3S-RH&AT sensors come with a 2-year warranty.
3- What is the price of relative humidity and ambient temperature sensor?
Between 200 and 250 EUR.
4- What are the delivery times?
- Small Orders (up to 20 pcs): approx. 2-3 weeks
- Bulk orders (20 pcs – 100 pcs): approx. 6-8 weeks
5- How do I set up the sensor?
Follow our user manual which include step-by-step instructions. The user manual link is
https://www.sevensensor.com/files/d/en/3S_RH_AT_PS_User_Manual.pdf
6- Does the sensor include a cable?
Each unit comes with a 3 m LIYYC11Y PUR Cable (UV and weather resistant). Other lengths are available on request.