The HTS401 simplifies the maintenance and calibration of humidity and temperature sensors thanks to its integrated rapidX technology. The sensor module can be replaced in the field without tools in just 10 minutes – including filter replacement and access preparation. The rapidX exchange requires no special tools, no trained personnel, and no process interruption. On-site calibration becomes obsolete, as each rapidX sensor is factory pre-calibrated and delivered with a digital inspection certificate according to DIN EN 10204-3.1. The certificate can be accessed directly via the E+E certificate service.

For comparison: A traditional external calibration by sending in the sensor requires full disassembly and can result in a process interruption of up to 3 weeks. As an alternative, E+E Elektronik offers the Omniport 40 – a flexible handheld calibration system for on-site adjustment, particularly well-suited for customers with their own service infrastructure. The calibration process is fast and precise, taking around 70 minutes in the field.

The HTS401 features an integrated Condensation Guard. This active heating function at the sensing element lowers the risk of dew formation during operation. When ambient conditions indicate a condensation risk, the sensor temperature is raised slightly to counteract moisture build-up on the surface. The output signal remains stable during sudden temperature drops and in high-moisture applications such as cold stores, agricultural ventilation systems or outdoor installations. This function helps avoid measurement errors and failures caused by condensation without materially affecting measurement dynamics.

With accuracy up to ±0.95 % RH and ±0.1 °C (±0.18 °F), the HTS401 delivers reliable values even in sensitive processes. More precise control improves energy efficiency. Derived humidity parameters such as dew point, mixing ratio and enthalpy are calculated internally, which supports use in HVAC, cleanroom and agricultural processes. The −40 °C to +80 °C (−40 °F to +176 °F) operating range ensures reliable performance in heated and unheated environments, for example outdoors or in storage areas with variable climatic conditions.

The HTS401 supports digital and analogue interfaces (RS-485 / Modbus RTU, 0–10 V, 4–20 mA) and can be fully configured using the E+E PCS10 software. Integration into existing systems is straightforward. Installation is fast, effort is low and parameters can be adjusted at a later stage. Wall-mount and duct versions are available, as well as remote-probe variants. An optional display allows multiple measured variables to be visualised simultaneously.