The PT100-1 is a screw-in type Platinum Resistance Thermometer (PRT) designed and manufactured by PIDMaxWell for demanding industrial temperature measurement applications. Built around a high-purity platinum sensing element that conforms to the IEC 60751 standard (R₀ = 100 Ω at 0 °C, α = 0.00385 Ω/Ω/°C), the PT100-1 delivers exceptional accuracy and long-term stability across a wide temperature range of −50 °C to +300 °C.

The sensor features a compact stainless steel probe body with a precision-machined threaded fitting that enables direct screw-in mounting into pipes, vessels, machinery, and process equipment without the need for additional fittings or adapters. Standard thread options include M6×1 mm, M8×1.25 mm, and 1/4 BSP, while custom thread specifications are available on request. The probe diameter and insertion length can likewise be tailored to the customer's exact installation requirements.

A key distinguishing feature of the PT100-1 is its fully customisable lead wire assembly. Four insulation materials — stainless steel braided, silicone, fibre glass, and PTFE (Teflon) — are offered to suit environments ranging from high-vibration industrial machinery to high-temperature ovens and chemically aggressive atmospheres. Lead wire lengths of 2 m, 3 m, and 5 m are available as standard, with custom lengths produced to order. The sensor is supplied in a 3-wire configuration as standard, minimising lead resistance errors and ensuring measurement accuracy over long cable runs.

The PT100-1 series is the most widely deployed screw-in RTD in PIDMaxWell's product portfolio, valued for its combination of measurement precision, mechanical robustness, installation flexibility, and competitive pricing. It is fully compatible with all standard PID temperature controllers, data loggers, PLC analogue input modules, and temperature transmitters that accept a 3-wire PT100 input.