Top worx TXP-P21GNPM161 - 21mm PNP Inductive Sensor - Industrial Stainless Steel IP67 - Proximity Switch

The Topworx TXP-P21GNPM161 is a high-precision, non-contact valve position sensor engineered for industrial automation systems requiring reliable feedback in extreme operational environments. Constructed with a corrosion-resistant 316L stainless steel housing (IP68/IP69K-rated), this sensor excels in harsh conditions, including exposure to moisture, dust, high-pressure washdowns, and temperatures from -40°C to +100°C.

Leveraging advanced Hall Effect sensing technology, it detects valve positions (open/closed or intermediate states) without mechanical contact, ensuring long-term accuracy and zero maintenance. Compatible with ball, butterfly, and gate valves, the TXP-P21GNPM161 is tailored for oil and gas, chemical processing, water treatment, and power generation industries.

• Output Signal: Dual NPN/PNP proximity switches (sinking/sourcing, 300 mA)
• Supply Voltage: 12-36V DC (universal input)
• Enclosure Rating: IP68/IP69K, NEMA 6P
• Housing Material: 316L stainless steel with PEEK sensing face
• Operating Temperature: -40°C to +100°C
• Connection Type: M16x1.5 quick-disconnect connector with shielded cable
• Certifications: ATEX/IECEx (Zone 0/20), SIL 3 compliance
• Sensing Range: Adjustable via magnetic cam (up to 15 mm)

The TXP-P21GNPM161 is deployed in oil and gas pipelines to monitor valve positions in explosive atmospheres, ensuring leak-proof fluid control in offshore platforms and refineries. In chemical plants, it provides critical feedback for valves handling aggressive acids, alkalis, or high-purity gases.

Water treatment facilities use it to track large-diameter gate valves in high-humidity pumping stations, while nuclear power plants rely on it for safety-critical steam valve monitoring. Its ATEX/IECEx Zone 0/20 certification makes it ideal for submerged or dust-laden environments, such as mining conveyors and grain silos. Additionally, it supports pharmaceutical cleanrooms and food processing systems requiring hygienic, washdown-ready solutions.

• Non-Contact Sensing: Hall Effect technology eliminates mechanical wear, enabling maintenance-free operation
• Extreme Durability: 316L stainless steel and PEEK components resist corrosion, UV radiation, and chemical abrasion
• Flexible Integration: Dual NPN/PNP outputs and M16 connector simplify integration with PLCs, DCS, and IoT platforms
• Safety Compliance: ATEX/IECEx Zone 0/20 and SIL 3 certifications for ultra-hazardous environments
• Field Adjustability: Tool-free magnetic cam and multi-turn potentiometer enable rapid calibration for complex valve geometries