Relative humidity sensor 3S-RH-I

screw-incapacitive4-20 mA

Overview The 3S-RH-I Relative Humidity Sensor measures ambient relative humidity (0–100% RH) and provides an analog 4–20 mA output for direct integration with dataloggers, gateways and PLCs. The unit is supplied with mounting accessories and a UV-resistant radiation shield to protect the sensing element from direct sunlight and radiation.

Working principle The capacitive sensor element is housed on an electronic board inside a UV-resistant enclosure. The sensor detects relative humidity with high sensitivity and converts the measurement to an analog 4–20 mA signal. The design is suitable for demanding climatic conditions and ensures stable readings over time.

Applications

• Solar energy systems and PV performance monitoring
• Industrial process control
• Production and manufacturing facilities
• Storage and warehousing environments
• Environmental monitoring in transportation vehicles
• Humidity control to protect moisture-sensitive products and equipment

Why choose Seven Relative Humidity Sensor?

• High accuracy: Provides reliable humidity data with low variation for precise monitoring and control.
• Weather resistant: UV-resistant shield and ABS enclosure for long-term outdoor operation.
• Easy integration: Standard analog 4–20 mA output for compatibility with dataloggers, gateways and PLCs.

Technical Specifications (table) Item Code: 3S-RH-I
Measured Data: Relative Humidity
Sensor Type: Capacitive
RH Range: 0% to 100%
RH Accuracy: ±1% RH (20–70%) at 25 °C
RH Resolution: 0.1%
Data Output: Analog 4–20 mA
Power Supply: 12 to 30 V DC
Power Consumption: 30 mA @ 24 V DC
Electrical Connection: 3 m LIYYC11Y PUR Cable, UV and weather resistant
Operating Temperature Range: -40 °C to +85 °C
Box Dimensions: 64 x 68 x 35 mm (W x L x H)
Shield Dimensions: Ø 105 x 100 mm
Weight: 0.5 kg
IP Rating: IP65
Box Material: ABS
Sensor Housing Material: Stainless steel tube – membrane filter
Shield Material: ABS
Standard: Class A according to IEC 61724-1:2021 (Relative Humidity)

Frequently Asked Questions (FAQ)

• What is the Class? All 3S-RH-I sensors are Class A according to IEC 61724-1:2021 (Relative Humidity).
• What is the warranty? All 3S-RH-I sensors come with a 2-year warranty.
• What is the price of the relative humidity sensor? The relative humidity sensor with analog output is typically between 250 and 300 EUR.
• What are the delivery times?
  • Small orders (up to 5 pcs): approx. 2–3 weeks
  • Bulk orders (up to 100 pcs): approx. 7–9 weeks
• How do I set up the sensor? Follow the user manual which includes step-by-step installation and wiring instructions (documentation provided by the manufacturer).
• Does the sensor include a cable? Each unit includes a 3 m LIYYC11Y PUR cable (UV and weather resistant). Other lengths available on request.

Caractéristiques / spécifications techniques

• Modèle: 3S-RH-I
• Donnée mesurée: Relative Humidity (0% – 100%)
• Type de capteur: Capacitive
• Précision: ±1% RH (20–70%) at 25 °C
• Résolution: 0.1%
• Sortie: Analog 4–20 mA
• Alimentation: 12–30 V DC
• Consommation: 30 mA @ 24 V DC
• Connexion électrique: 3 m LIYYC11Y PUR Cable (UV & weather resistant)
• Température de fonctionnement: -40 °C to +85 °C
• Indice de protection: IP65
• Matériaux: Box ABS, Shield ABS, Sensor housing stainless steel tube with membrane filter
• Dimensions box: 64 x 68 x 35 mm; Shield Ø 105 x 100 mm
• Poids: 0.5 kg
• Standard: Class A according to IEC 61724-1:2021