testo Surface Probe Robust Waterproof Temperature Sensor -50 to 400 °C Pt100 (0609 1973)

Measuring surface temperature in wet or harsh environments often damages standard probes. The testo surface probe 0609 1973 solves this with a robust, waterproof design that withstands moisture and mechanical stress while delivering precise Pt100 measurements.

Who is it for

Maintenance technicians, HVAC engineers, and industrial quality inspectors who need reliable surface temperature readings on pipes, tanks, or machinery, even in damp or dusty conditions.

Main features

• Pt100 Class A sensor for high accuracy from -50 to +400 °C
• Waterproof probe and cable (IP67) for use in wet environments
• Robust construction with 8 mm probe head and silicone cable
• Fast response: t99 in 5 seconds on metallic surfaces
• Fixed cable with Testo plug for direct connection to compatible Testo instruments

Specifications

• Sensor type: Pt100 (Class A)
• Measurement range: -50 to +400 °C
• Accuracy (-50 to +200 °C): ±(0.15 °C + 0.2 % of mv)
• Accuracy (+200.1 to +400 °C): ±(0.25 °C + 0.2 % of mv)
• Response time (t99): 5 seconds on metallic surface
• Probe head diameter: 8 mm
• Probe head length: 100 mm
• Cable length: 1.5 m
• Cable material: Silicone
• Protection class (probe & cable): IP67
• Connector type: Fixed cable with Testo plug
• Handle material: Plastic
• Standard compliance: DIN EN 60751

Tips

For best accuracy, ensure the probe head makes full contact with the surface and allow a few seconds for stabilisation. The silicone cable remains flexible even at low temperatures, making it suitable for cold storage applications.