IEC 60335-2-9 Surface Temperature Probe

IEC60335-2-9  Figure 105 surface temperature probe is built for accurate surface temperature rise testing of household and similar electrical appliances. It features a Type K thermocouple (chrome alumel, 0.3mm wire) for reliable thermal sensing, a handle that maintains a steady 4 N ± 1 N contact force, and a flat tinned copper disc (5mm diameter, 0.5mm thick) for consistent surface contact. A durable polycarbonate tube (3mm inner, 5mm outer diameter) boosts structural stability, making it ideal for devices like tumble dryers, grills.

Specifications:
• Thermocouple Type:  Type K (chrome alumel).
• Thermocouple Wire Diameter:  0.3 mm
• Contact Force:  4 N ± 1 N (enabled by handle arrangement)
• Tinned Copper:  Disc 5 mm diameter, 0.5 mm thickness (flat contact face)
• Polycarbonate Tube:  Inner diameter: 3 mm; Outer diameter: 5 mm
• Handle Function:  Ensures consistent contact force and easy probe positioning

Test Procedures:
• Check the probe for damage (e.g., cracked tube, loose copper disc).
• Place the flat copper disc on the appliance’s target surface.
• Use the handle to apply a 4 N ± 1 N contact force.
• Wait for the temperature reading to stabilize.
• Record the measured surface temperature.
• Gently remove the probe from the appliance.

Applications:
• Surface temperature rise testing for household tumble dryers.
• Thermal safety checks for portable grills and toasters (per IEC 60335-2-9 Figure 105).
• Temperature measurement of oven and hob surfaces during compliance testing.
• Surface thermal verification for small portable cooking appliances.

IEC 60335-2-9 Surface Temperature Probe