Relative humidity and temperature sensor 3S-RH&AT

I2C3VDCIP65

Product overview
The SEVEN 3S-RH&AT is a capacitive sensor designed to measure relative humidity and ambient temperature, with an optional pressure measurement capability. The sensor is supplied with mounting hardware and a UV-resistant plastic radiation shield composed of four aspirated plates that permit free airflow while protecting the measuring elements.

Working principle
The sensing element is housed inside a UV-resistant protective shield. The 3S-RH&AT measures relative humidity and ambient temperature via a measuring transmitter with I²C output. A 7‑pin connector allows integration with SEVEN irradiance sensors, Sensor Boxes, dataloggers and other receiving devices for straightforward system integration.

Applications

• Solar energy systems and PV monitoring
• Industrial sites and process control
• Production and manufacturing facilities
• Storage and warehouse condition monitoring
• Environmental assessment inside transport vehicles
• Humidity control to protect moisture-sensitive products and equipment

Installation
Run a system check at ground level before final mounting. Install the sensor away from dark, reflective or heat-absorbing surfaces and local heat sources (vent outlets, chimneys). For roof installations, mount on the side exposed to prevailing wind. Installation is performed in two stages: fix the mounting structure, then attach the sensor to the mounting frame.

Key advantages

• Accurate measurements: Designed to deliver humidity and temperature data within the specified tolerances.
• Weather resistance: ABS shield and corrosion-resistant construction for outdoor use.
• Shielded design: UV-resistant radiation shield protects sensing elements for consistent readings.

FAQ (summary)

• Class: All 3S-RH&AT units are Class A according to IEC 60751:2022 (Temperature) and Class A according to IEC 61724-1:2021 (Relative Humidity).
• Warranty: 2 years.
• Price: Approx. 145–260 EUR.
• Lead times: Small orders (up to 20 pcs): approx. 2–3 weeks; bulk (20–100 pcs): approx. 6–8 weeks.
• Configuration: Follow the user manual (manual available).
• Cable included: Supplied with a 3 m LIYYC11Y PUR cable (UV- and weather-resistant); other lengths on request.

Technical specifications

• Item code: 3S-RH&AT
• Measured data: Relative humidity and ambient temperature (pressure optional)
• Sensor type: Capacitive
• RH range: 0% to 100%
• RH accuracy: ±1% RH (20…70%) @ 25 °C
• RH resolution: 0.1%
• Temperature range: -40 °C to +85 °C
• Temperature accuracy: ±0.1 °C (5…60 °C)
• Temperature 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: IP65
• 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)