What Are ExProof Temperature and Humidity Sensors?

ExProof Temperature and Humidity Sensors are ex-proof protected sensors used to measure temperature and humidity in areas where explosive gas, vapour, or dust atmospheres may occur.

In ATEX-zoned facilities where standard sensors are not suitable for safety reasons, temperature-humidity sensors with an ex-proof enclosure and appropriate electrical protection are preferred.

Operating Principle

The sensor detects ambient temperature and relative humidity, then transmits the data to the automation system as an analogue or digital output signal.

Measured values can be used by fans, air-handling units, dehumidifiers, humidifiers, alarm panels, exhaust fans, or building-management systems for control scenarios.

Applications

• ATEX-zoned production areas
• Chemical and petrochemical facilities
• Refinery and solvent processes
• Paint, coating, and flammable-vapour areas
• Battery rooms and hydrogen-risk areas
• Ex-proof air-conditioning and ventilation systems
• Dehumidification and humidification systems
• Clean rooms, laboratories, and controlled areas
• Pharmaceutical, food, and process-production plants
• PLC, BMS, and SCADA automation systems

Technical Features

• Ex-proof enclosure and safe connection structure
• Model options suitable for ATEX areas
• Temperature and relative humidity measurement
• 4–20 mA, 0–10 V, or other output-signal options
• 24V DC and other supply-voltage alternatives
• Wall, duct, or field mounting options
• Durable enclosure suitable for the required IP protection class
• Sensor structure suitable for industrial conditions
• Integration with automation, alarm, and control panels

System Advantages

• Provides safe measurement in explosive-atmosphere areas.
• Supports continuous monitoring of temperature and humidity values.
• Can operate with HVAC, process, and humidity-control systems.
• Provides reliable data for alarm and automation scenarios.
• Supports environmental comfort, process safety, and equipment protection.
• Contributes to energy efficiency through correct control of fan, air-conditioning, and humidity systems.

Selection Criteria

When selecting a temperature and humidity sensor, the measuring range, zone classification, mounting type, output signal, supply voltage, ambient conditions, and automation infrastructure should be evaluated together.

• ATEX zone classification and certification requirement
• Temperature and humidity range to be measured
• Wall, duct, or field-mounting requirement
• 4–20 mA, 0–10 V, or digital communication output
• PLC, BMS, SCADA, or alarm-panel connection
• Temperature, humidity, dust, and chemical-vapour conditions
• Enclosure material and IP protection class
• Cable connection, gland, and panel integration
• Maintenance access and calibration requirement

Use in HVAC and Process Control

In ex-proof HVAC systems, temperature and humidity sensors can operate with air-handling units, fresh-air systems, exhaust fans, dehumidifiers, humidification systems, and automation panels.

In process facilities, they provide critical measurement data for monitoring ambient conditions, maintaining product quality, equipment safety, and energy management.

Use in ATEX Areas

Temperature and humidity sensors used in areas with explosive-atmosphere risks must have an appropriate ex-proof protection structure. Standard sensors may create an electrical risk, so products suitable for the zone classification should be selected.

In areas with risks from chemical vapours, solvents, hydrogen, paint, gas, or dust, measuring equipment should be selected in accordance with ATEX requirements and installed correctly.

Automation Integration

Temperature and humidity information from sensors can be transferred to PLC, BMS, SCADA, fan-control panels, dehumidification systems, air-handling unit automation, or alarm panels.

When values exceed defined limits, scenarios such as fan activation, dehumidification, humidification, cooling, heating, or alarm generation can be applied.

Maintenance and Calibration

To ensure reliable measurement, the mounting point, cable connection, output signal, panel connection, and measurement accuracy should be checked regularly.

For critical processes, periodic inspection, calibration when required, and verification of the values on the automation screen are recommended.

Airtes ExProof Measurement and Control Solutions

Airtes supports correct product selection for ExProof Temperature and Humidity Sensors used in ATEX-zoned facilities by evaluating the application area, measuring range, output signal, zone classification, and automation infrastructure together.

Project-based solutions can be created for ex-proof HVAC, process control, dehumidification, humidification, alarm systems, and building automation.

Contact Airtes for ExProof Temperature and Humidity Sensors Suited to Your Project

The zone classification, measuring range, mounting type, output signal, supply voltage, and automation infrastructure at your facility should be analysed before selecting ExProof Temperature and Humidity Sensors. The Airtes technical team provides professional support for an appropriate temperature and humidity measurement solution.

Contact us for detailed information, a site survey, and a project-based quotation.