Screw-in Type PT100 RTD Temperature Sensor

The PT100-9 is a tri-clamp liquid-tight Platinum Resistance Thermometer (PT100 RTD) engineered for reliable and accurate temperature measurement in sanitary and process environments where a secure, leak-proof connection is essential. The sensor features a stainless steel flanged tri-clamp fitting that forms a robust liquid-tight seal, making it ideally suited for food processing, dairy, brewing, pharmaceutical, and chemical applications where hygiene and contamination prevention are paramount. The probe is constructed from stainless steel and is available in three diameters (4 mm, 5 mm, and 6 mm) with probe lengths of 30 mm, 40 mm, or 50 mm, all of which can be customised to meet specific installation requirements. Lead wire material is fully selectable — stainless steel braid, silicone, fiberglass, or Teflon — allowing the sensor to be matched to the thermal and chemical conditions of the surrounding environment. Lead wire length is available in 2 m, 3 m, or 5 m. The “-TC” suffix in the ordering code designates the tri-clamp liquid-tight connection, clearly distinguishing this series from standard probe-type RTDs.

The Maxwell PT100-2 Series is a versatile and robust probe-type Resistance Temperature Detector (RTD) designed for precise and reliable temperature measurement across a wide range of industrial applications. This series offers exceptional flexibility with customizable probe diameters, lengths, and compensation lead wires, ensuring seamless integration into diverse systems. Engineered for durability, the PT100-2 series can also be configured with a waterproof design, making it suitable for challenging environments. With its high accuracy and customizable features, the PT100-2 series provides an ideal solution for demanding temperature sensing requirements.

The PT100-3 is a widely used probe-type Platinum Resistance Thermometer (PT100 RTD) engineered for reliable and accurate temperature measurement in harsh industrial environments. The sensor integrates a rugged Form B connection box that protects internal wiring from dust, moisture, and mechanical damage, making it especially well suited for outdoor installations, chemical plants, and other demanding process environments. Compliant with EN 60751, the PT100-3 delivers a broad measurement range of −70 °C to +300 °C with high stability and repeatability. The sensor is compatible with a variety of standard process fittings — including 1/2 NPT, 1/2 BSP, 3/4 NPT, and M16 — enabling straightforward integration into existing pipelines and equipment. Probe diameter and length are fully customisable, allowing the PT100-3 to be tailored to virtually any installation requirement.

The PT100-5 is a compact and versatile probe-type Platinum Resistance Thermometer (PT100 RTD) featuring a stainless steel sensing tube without screw fittings. This design makes it an ideal choice for applications where the sensor is inserted directly into a thermowell, clamped in place, or embedded within equipment — offering a clean, low-profile installation without the need for threaded process connections. The PT100-5 is fully waterproof, making it well suited for wet or humid environments. Lead wire material and length are fully customisable, and the sensor is available in three probe diameters and multiple probe lengths to accommodate a wide range of installation geometries. Its straightforward construction and broad compatibility make it a popular choice for both OEM integration and field replacement applications.

The PT100-8 is a probe-type Platinum Resistance Thermometer (PT100 RTD) distinguished by its adjustable insertion depth — a key feature that sets it apart from fixed-length sensors. A stainless steel compression fitting is integrated into the assembly, forming a liquid-tight or pressure-tight seal against the process wall while allowing the operator to slide and lock the probe at any desired insertion depth before or after installation. This eliminates the need to specify a fixed immersion length at the time of ordering and greatly simplifies retrofitting into existing equipment. The probe is constructed from 304 stainless steel and is available in diameters of 4 mm, 5 mm, and 6 mm. The lead cable is shielded with a metal braid and covered with PTFE insulation, delivering low noise, high mechanical strength, and excellent resistance to elevated temperatures. The PT100-8 is compatible with a wide range of process fittings — including NPT, BSP, and metric threads — and is available in a waterproof configuration, making it suitable for measuring the temperature of both air and liquids across diverse industrial environments.

The PT100-12 is a PT100 Platinum Resistance Thermometer featuring an adjustable compression fitting combined with a robust Form B aluminium connection box (connection head). This combination delivers two key advantages in a single assembly: the compression fitting allows the probe insertion depth to be set and locked at any position within the fitting stroke, eliminating the need for custom-length probes during installation; and the sealed connection box provides a weather-resistant, vibration-tolerant housing for field wiring that is well suited to demanding industrial environments. The sensor complies with EN 60751 and covers a temperature range of −70 °C to +300 °C, making it suitable for a wide spectrum of process and industrial applications. The stainless steel probe is available in three diameters — 4 mm, 5 mm, and 6 mm — and three standard lengths of 50 mm, 100 mm, and 150 mm, all of which can be customised to order. Adjustable process fittings are available in ½ NPT, ¼ NPT, and ¼ BSP thread forms, enabling direct installation into standard process pipework and vessels without adapters. The connection box accepts standard conduit entries, and the sensor ships without lead wire, with all field connections made inside the terminal block housed within the connection box.

The PT100-14 is a bolt-on PT100 Platinum Resistance Thermometer designed for direct surface temperature measurement. The sensor element is integrated into a ring (eye) terminal lug that is bolted or screwed directly onto the surface to be measured — such as a motor casing, heat sink, pipe outer wall, bearing housing, or structural component — ensuring intimate thermal contact without the need for a thermowell, probe pocket, or adhesive. This makes the PT100-14 an exceptionally convenient and cost-effective solution wherever surface temperature monitoring is required. The ring terminal inner diameter is available in 6 mm or 8 mm as standard, and can be customised to match any bolt or screw size specified by the customer. The sensor is supplied with a stainless steel braided cable for mechanical protection and EMI shielding, and the lead wire material is fully selectable from stainless steel braid, silicone, fiberglass, or Teflon to suit the thermal and chemical conditions of the installation environment. Standard cable lengths are 2 m, 3 m, and 5 m, with custom lengths available on request. The sensor is available in temperature ranges up to 100 °C, 200 °C, or 300 °C.

The PT100-15 is a flexible, PFA-insulated RTD sensor engineered for precise temperature measurement in highly corrosive environments. Both the probe and cable are fully encapsulated in fluoropolymer (PFA), offering exceptional resistance to saline solutions, strong acids, caustic fluids, and electroplating baths. Designed for continuous immersion, the sensor’s flexibility allows for easy installation in confined or complex spaces, ensuring reliable performance in demanding industrial applications.