DVTc-304 Humidity and Temperature Sensor

The company "REGMIK" manufactures humidity and temperature sensors DVTc-304 with a digital sensor SHTxxx. For temperature measurement, sensors from the German firm Heraeus are used.

Humidity and temperature sensors are designed to convert the value of relative humidity of a gas environment and its temperature (except aggressive gases) into standard electrical signals:

• I²C - digital sensors;
• 0-10 V voltage - for digital and analog sensors;
• 4-20 mA current - for digital and analog sensors;
• RS-485 (ModBus RTU protocol) - for digital sensors.

The scope of application of air humidity sensors is very wide and includes:

• Maintaining the microclimate within set limits in production equipped with humidity-sensitive electronic devices;
• Monitoring humidity levels in office premises, household environments;
• In the housing and communal services sector - in boiler rooms and water treatment plants to prevent condensation;
• Periodic control to prevent mold and mildew formation on building walls or warehouses;
• Control of technological processes;
• Control of environmental parameters, etc.

The DVTc-304 humidity and temperature sensors do not allow moisture condensation.

Measuring element for DVTc-304 humidity sensors

The sensors may use measuring elements HIH4xxx (manufactured by Honeywell International, Inc., USA) or SHTxxx (Sensirion, Switzerland).

The multilayer design of the HIH4xxx sensitive element ensures high resistance to most influences such as wetting, dust, dirt, oils, and common chemicals in the environment. Key characteristics of sensors based on the HIH4xxx series elements:

• Molded thermoset plastic housing;
• Almost linear output voltage depending on relative humidity;
• Interchangeability with laser calibration;
• Low power consumption design;
• Increased accuracy;
• Fast response time;
• Stable characteristics with low drift;
• Chemical resistance.

DVTc-304 humidity and temperature sensors based on the SHTxxx series elements have the following distinctive characteristics:

• High reliability and long-term stability;
• Proven industry technology with over 10 years of experience;
• Designed for mass production;
• Optimized for minimal cost;
• Low signal noise level.

The converter operates stably within the recommended humidity and temperature measurement range. Prolonged exposure to conditions outside the normal range, especially at humidity > 80%, may temporarily increase measurement errors. After returning to the normal range, it slowly returns to factory parameters.

Special caution should be observed when using the converter under high humidity conditions (> 98%) and near the dew point, as wetting can irreversibly damage the sensitive element.

It is recommended to install DVTc-304 sensors with a protective cover and the sensitive element facing downwards, which minimizes sensor damage in high humidity and near the dew point. The sensor is mounted so that air freely circulates around it. When choosing a wall location, avoid drafts, direct sunlight, and other heat sources. Installation is carried out directly on the wall.

Other modifications of humidity sensors are also produced, which can be viewed via the link...