Advanced sensor protection and fast, tool-free module replacement help reduce maintenance costs and improve measurement reliability.
Accurate humidity and temperature measurement are essential for effective process control, yet demanding industrial environments can make reliable long-term measurement difficult. Contamination, condensation and chemical exposure can contribute to measurement drift, additional maintenance and unplanned downtime.
The HTS401 industrial humidity and temperature transmitter from E+E Elektronik addresses these challenges through two key innovations: SensShield sensor protection and rapidX modular technology. SensShield helps protect the sensing element from contamination, while rapidX allows a factory-calibrated measuring module to be exchanged quickly and without tools. Complementary Condensation Guard and Automatic ReCovery functions provide further resilience in challenging conditions.
SensShield: protecting humidity sensors against contamination
Dust, dirt, oily deposits and salts can accumulate on exposed sensor components, potentially compromising measurement accuracy and stability. E+E SensShield is a proprietary protective coating applied to the sensing element, connecting leads and solder pads. It helps protect these components from contamination and reduces the risk of leakage currents that can impair measurement stability.
Practical benefits of SensShield
- Improved long-term measurement stability in contaminated environments.
- Reduced risk of contamination-related measurement drift.
- Greater protection of sensitive sensor components.
- Potentially fewer maintenance interventions and sensor replacements.
SensShield primarily prevents contamination-related electrical effects, it should not be confused with E+E’s separate ChemShield technology
Additional protection against condensation and chemical influences
Condensation Guard (CG)
In high-humidity environments or during rapid temperature changes, condensation can form on a sensor and delay its return to reliable readings. Condensation Guard uses controlled heating to reduce the risk of condensation on the sensing element, helping maintain reliable measurements in environments with high humidity or fluctuating temperatures.
Automatic ReCovery (ARC)
Automatic ReCovery uses controlled heating to help the sensor recover from certain chemical influences. Together with SensShield and Condensation Guard, ARC contributes to the HTS401’s wider approach to protecting measurement performance in demanding environments.
RapidX: simplifying calibration and reducing downtime
Even well-protected humidity sensors need periodic calibration checks or replacement. Conventional procedures may require instrument removal, off-site calibration or lengthy maintenance visits. The HTS401’s rapidX concept makes this process easier by allowing the measuring module to be replaced on site without special tools or removing the complete transmitter.
Replacement rapidX modules are factory-calibrated and supplied with digital inspection documentation in accordance with DIN EN 10204-3.1.
Why rapidX matters to maintenance teams
- A module exchange can be completed quickly; E+E describes a complete maintenance procedure of approximately 10 minutes.
- Tool-free replacement simplifies work at the measurement point.
- The hot-swappable design avoids the need to power down the transmitter for module exchange.
- Factory-calibrated modules reduce the need for conventional on-site recalibration.
- Digital inspection documentation supports traceability and quality procedures.
Across installations with numerous measurement points, these time savings can help lower labour costs and reduce disruption during scheduled maintenance.
Accurate measurement and flexible integration
Alongside its advanced sensor protection and simplified maintenance, the HTS401 delivers high-accuracy humidity and temperature measurement with flexible output options for industrial automation and building management systems. Its key specifications include:
| Specification | HTS401 capability |
|---|---|
| Relative humidity | 0–100% RH |
| Humidity accuracy | Up to ±0.95% RH |
| Temperature accuracy | Up to ±0.1°C |
| Temperature range | Configuration-dependent; up to −40 to +80°C |
| Outputs | Analogue and RS-485 / Modbus RTU options |
| Enclosure | IP66 / NEMA 4X |
With additional calculated parameters, including dew point, mixing ratio and enthalpy, the HTS401 supports a wide range of industrial monitoring and process control applications. Available measurement ranges and outputs depend on the selected configuration.
Where can the HTS401 make a difference?
Industrial HVAC and building automation
Humidity monitoring in ventilation systems, plant rooms and other demanding installations.
Food processing and storage
Reliable monitoring in humid environments exposed to cleaning processes and airborne contaminants.
Agriculture and livestock facilities
Long-term temperature and humidity monitoring where dust and moisture are common.
Controlled production environments
Measurement points where traceability and straightforward calibration and maintenance are important.
Cold storage and refrigeration
Applications where temperature variation and condensation risk complicate reliable humidity monitoring.
Lowering the lifetime cost of humidity measurement
Purchase price is only one part of the cost of an industrial humidity transmitter. Calibration effort, maintenance labour, downtime and replacement frequency all affect total cost of ownership. The HTS401 addresses these practical concerns through complementary technologies: SensShield helps protect against contamination; Condensation Guard and ARC help manage moisture and certain chemical influences; and rapidX simplifies calibration-related maintenance.
For system integrators and operators, the result is a transmitter designed to combine precise measurement with more efficient upkeep over its service life.
Find out more
Explore the E+E Elektronik HTS401 or contact our team to discuss the requirements of your application.
