Relative humidity and temperature probe STA-3

wall-mountanalog4-20 mA

Description
Wall-mounted ambient temperature and relative humidity transmitter for building and industrial monitoring. Models STA-3 (for clean indoor environments) and STA-3E (for industrial and outdoor environments).

Functional summary
Wall-mounted unit measuring ambient temperature and relative humidity with 4/20 mA outputs suitable for integration into HVAC, BMS and process control systems.

Key features

• Probe housing dimensions: 105 x 55 x 46 mm.
• Temperature range: STA-3: 0 to 50 °C; STA-3E: -5 to 55 °C.
• Temperature accuracy: ±0.5 °C.
• Temperature output: 4/20 mA analogue signal.
• Humidity sensor: capacitive (STA-3); STA-3E specified for 0–100%.
• Humidity range: 0–100% RH.
• Humidity accuracy: better than 3% RH (5–95% range).
• Humidity output: 4/20 mA analogue signal.
• Enclosure/presentation: ABS box 110 x 75 x 57 mm.
• Ingress protection: IP65; sensors fitted with sintered bronze filters.

Applications
Monitoring and control of HVAC, building automation, laboratories, residential spaces and industrial or outdoor locations (use STA-3E for harsh environments).

Variants and installation

• Model references: STA-3 (clean indoor use) and STA-3E (industrial/outdoor).
• Presentation: probe unit with ABS enclosure (110 x 75 x 57 mm) for wall mounting.
• Electrical interface: 4/20 mA outputs for direct connection to controllers and acquisition systems.

Technical specifications

• Series: STA-3 (includes STA-3 and STA-3E).
• Probe dimensions: 105 x 55 x 46 mm; enclosure: 110 x 75 x 57 mm.
• Temperature ranges: STA-3: 0–50 °C; STA-3E: -5–55 °C.
• Temperature accuracy: ±0.5 °C.
• Temperature electrical output: 4/20 mA analogue.
• Humidity sensor type: capacitive (STA-3); STA-3E rated 0–100%.
• Humidity range: 0–100% RH.
• Humidity accuracy: <3% RH (5–95% RH).
• Humidity electrical output: 4/20 mA analogue.
• Ingress protection: IP65; sensors protected with sintered bronze filters.
• Mounting: wall-mounted.