Temperature Probes

The S55501 is a bimetal temperature gauge from WIKA, designed for industrial temperature measurement. It is typically part of the Model 55 series (heavy-duty industrial thermometers). ⭐ Key Specifications (S5551 / S55501) Type: Bimetal dial thermometer Dial size: ~160 mm (common variant) Temperature range: Common: 0 to 160°C Variants: -20 to +120°C or wider ranges available Accuracy: Class 1 (high industrial accuracy) Material: Stainless steel (case + stem) Process connection: 1/2" NPT (standard) Stem length: Multiple options (150 mm to 500+ mm) Stem diameter: ~6–8 mm Window: Safety glass Mounting: Adjustable stem & dial ⚙️ How it works This model uses a bimetal coil: Two different metals expand at different rates when heated This causes the coil to rotate The rotation moves the pointer on the dial This is a mechanical, no-power-required temperature measurement system 🏭 Typical Applications Pipelines (steam, water, oil) Boilers & HVAC systems Chemical & process industries Compressors & hydraulic systems