Industrial IoT using 7Semi SHT20 Humidity and Temperature Sensor Sensirion Swiss with
Node MCU for automated cloud system with Blynk App and Thingspeak App
The SHT20 humidity and temperature sensor of Sensirion has become an industry standard in terms of form factor and intelligence: Embedded in a reflow solderable Dual Flat No leads (DFN) package of 3 x 3mm footprint and 1.1mm height it provides calibrated, linearized sensor signals in digital, I2C format. The SHT2x sensors contain a capacitive type humidity sensor, a band gap temperature sensor and specialized Analog and digital integrated circuit – all on a single CMOSens® chip. This yields in an unmatched sensor performance in terms of accuracy and stability as well as minimal power consumption.
Every sensor is individually calibrated and tested. Lot identification is printed on the sensor and an electronic identification code is stored on the chip – which can be read out by command. Furthermore, the resolution of SHT2can be changed by command (8/12bit up to 12/14bit for RH/T) and a checksum helps to improve communication reliability. With this set of features and the proven reliability and long-term stability, the SHT2x sensors offer an outstanding performance-to-price ratio. For testing SHT2x two evaluation kits EK-H4 and EK-H5 are available.
Sensor Chip SHT20 features a generation 4C CMOSens® chip. Besides the capacitive relative humidity sensor and the band gap temperature sensor, the chip contains an amplifier, A/D converter, OTP memory and a digital processing unit.
Key Features of 7Semi SHT20 Humidity and
- Temperature Sensor Probe
- Breathable shell
- Corrosion resistance
- High temperature resistance
- Large air permeability, fast gas humidity flow and
- exchange rate, uniform divergence.
- Excellent ability of anti-dust, anti-corrosion and
- waterproof (IP65）
Protecting PCB modules from dust, particulate pollution and oxidation of most chemicals to ensure sensors a long-term stable operation, higher reliability and long service life
Remarkable performance in harsh environments such as small space, pipe, trench, wall pass mounting, high-pressure space, vacuum chamber, test chamber, large flow mediums, high humidity area, high temperature and heat environment, hot drying process, dangerous zones, explosive environment containing explosive gas or dust, etc
- 150 bar anti-pressure capability
- Seamless integrated, shedding-free
- The stainlesssteel porous housing for sensor probe, have accurate pore size, uniform and
- even-distributed apertures.
- Pore size range: 5 to 120 microns; it has good filtration, dustproof and interception effect,
- high filtration efficiency
- Fully calibrated
- Digital output, I2C interface
- Low power consumption
- Excellent longterm stability
- Equipped with an I2C interface for seamless connectivity
- Perfect for monitoring humidity and
- temperature in a manufacturing plant,
- laboratory, or outdoor setting
- wide temperature range (-40C to 125C).
- The probe connector is Mini Round Shell type and wire length is 1 meter.
- Relative Humidity resolution at 12bit 0.04 %RH
- Relative Humidity resolution at 8bit 0.7 %RH
- Temperature resolution at 14bit 0.01 °C
- Temperature resolution at 12bit 0.04 °C
- Supply Voltage, VDD 2.1 to 3.6 Volts
The primary role of SHT20 Humidity and Temperature Sensor in HVAC system is to provide accurate and real-time temperature and humidity measurements. This data is crucial for maintaining the desired temperature and humidity inside the buildings ensuring comfort for the occupants and computer equipment as well, preventing discomforts either due to higher temperature and humidity or lower. Hence on periodic basis this data is uploaded to the cloud and made available to the staff on mobile using different Apps. The periodicity of the sampling is user selectable.
Settings are available for higher and lower Temperature and humidity independently selectable. In case either the temperature or humidity is beyond the set point notification will be sent to the cloud which in turn lands on to the mobile numbers registered in the application.