Humidity and Temperature Sensor DVT-303, DVTc-303

The enterprise "REGMIK" manufactures humidity and temperature sensors with digital (DVTc-303) and analog (DVT-303) sensitive elements. The DVT-303 sensors use the HIH4xxx element for humidity measurement, while the DVTc-303 sensors use the SHTxx element. Temperature measurements are made using temperature sensors from the German company Heraeus.

The DVTc-303 humidity sensor is used in automated control and regulation systems for technological processes in production. It is also applied in control and monitoring systems for indoor microclimate and drying chambers. The protective cover of the sensor is made of sintered stainless steel particles with a fine porous structure that does not oxidize.

Thanks to this, the sensitive element is protected from fine dust and splashes falling from any direction. In case of resin, sawdust, dirt, etc., adhering to the protective cover, it can be carefully removed and washed in a solvent. However, it must be thoroughly dried before reinstalling.

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

• analog voltage (measured voltage value at the humidity sensor);
• I2C - digital sensors;
• 0-10 V voltage - for both digital and analog sensors;
• 4-20 mA current - for both digital and analog sensors;
• resistance (temperature values from Pt100, Pt500, or Pt1000 sensors) - for analog sensors;
• RS-485 (ModBus RTU protocol) - for digital sensors.

The application areas of air humidity sensors are very broad and include:

• Maintaining microclimate within set limits in production equipped with humidity-sensitive electronic devices;
• Monitoring humidity indicators in office spaces and homes;
• In utilities - in boiler rooms and water treatment plants to prevent condensation;
• Periodic control to help prevent the appearance of fungus, mold on building walls or warehouses;
• Control of technological processes;
• Monitoring environmental parameters, etc.

The material of the sensor's protective fittings is stainless steel grade 12X18H10T. DVT-303 and DVTc-303 humidity and temperature sensors prevent moisture condensation.

The multilayer construction of the HIH4xxx sensitive element provides high resistance to most hazards of use, such as wetting, dust, dirt, oils, and common chemical substances in the environment. Main characteristics of sensors based on HIH4xxx elements include:

• Cast housing made of thermosetting plastic;
• 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.

The converter operates stably within the recommended measurement ranges of humidity and temperature. Prolonged exposure to conditions outside the normal range, especially humidity above 80%, may temporarily increase measurement error. After returning to the normal range, the sensor will slowly return to factory settings.

Special caution should be exercised when using the converter in conditions of high humidity (> 98%) and near the dew point, as wetting can cause irreversible damage to the sensitive element.

There are other modifications of humidity sensors available, which can be found at this link...