Capacitive humidity sensor TDS501

indoorhangingsurface-mounted

Overview
The TDS501 is a dew point transmitter designed for demanding industrial drying applications (for example battery cell production) and other processes requiring reliable measurement at very low moisture levels. It provides continuous dew point data down to -70 °C Td (-94 °F Td) and is engineered to avoid signal freezing during auto-calibration so that process mapping and dehumidification control remain stable 24/7. The device features a stainless steel industrial design and supports both analogue and digital integration for reduced energy use and minimized unplanned downtime.

Key features

• Continuous measurement without signal freezing
• Advanced auto-calibration for stable 24/7 process control (designed to avoid process blind spots)
• Four-element measuring method with robust capacitive sensor elements (E+E Quattro Sensor technology)
• Fast response time and high repeatability
• Accuracy: ±2 °C Td
• Pressure rating up to 80 bar (1,160 psi)

Application areas

• Industrial drying — drying rooms for battery cells, drying ovens (coatings, powder coatings, electronics), plastics drying (granulate dryers & material drying)
• Pharmaceutical industry — compressed air drying, coating quality control, filling and packaging
• Food & beverage — compressed air drying, coating quality control, filling and packaging

Design and measurement system
E+E Elektronik delivers the TDS501 as a fully tuned measurement system: sensing element, electronics, mechanical integration, mounting and adjustment are aligned to deliver reproducible and stable measurement performance across devices, batches and operating conditions. The sensor is engineered to ensure typical process temperature changes do not undermine the dew point result and to operate reliably under dynamic environments and temporary condensation events.

Benefits / Advantages

• Reliable dew point monitoring down to -70 °C Td for demanding industrial drying processes
• Auto-calibration concept that avoids freezing the output signal and prevents process blind spots
• Condensation handling via wettable sensing elements, stainless steel sintered filter and robust construction
• Configurable filter caps (standard stainless steel filter or optional open filter cap for faster response in cleanrooms)

Caractéristiques / spécifications techniques

• Measuring range: -70...+60 °C Td (-94...+140 °F)
• Accuracy: ±2 °C Td (±3.6 °F)
• Pressure rating: 80 bar (1,160 psi)
• Digital interface: RS485 (supports Modbus RTU)
• Analogue output option: 4 - 20 mA (wide scaling range)
• Protection rating / enclosure: IP65, stainless steel construction (1.4404)
• Process connection: stainless steel, G 1/2" ISO or 1/2" NPT
• Sensor technology: E+E Quattro Sensor / four-element measuring method with robust capacitive elements and auto-calibration
• Measurement parameters: dew point, frost point, volume concentration
• Temporarily wettable sensing elements and configurable filter caps for balance between protection and response time