The temperature and humidity transmitter mostly uses a temperature and humidity integrated probe as a temperature measurement element, collecting the temperature and humidity signals, and the stabilization filtering, computing amplification, non -linear correction, V/i conversion, constant current and reverse protection, etc.After the circuit is treated, the current signal or voltage signal output with a linear relationship with temperature and humidity becomes a linear signal output. It can also directly output the interface such as 485 or 232 through the main control chip [1].
Temperature and humidity transmitter brand
The production of Apelons temperature and humidity transmitter is at least twenty years, so this brand is also well received among consumers. The most popular in the warm and humid transmitter in Apepel is the CWS 11 economy temperature and humidity transmitter. ThisOne.It is made of Sensirion11 temperature and humidity sensor. It has good long-term stability, full-range temperature compensation, and the temperature range of the sensor work reaches (-40 ℃ ～ 100 ℃).The characteristics of the other, and its service life is also long, strong anti -interference ability, it is wide voltage power supply, non -linear correction, high accuracy, with wiring reverse and overvoltage protection, current limiting protection, which is very safe and reliable.Lianlis most popular is the HX71 series. Compared with the temperature and humidity transmitter of other brands, it has a compact design and is very suitable for wall or pipeline installation.Each device is calibrated from factory to provide excellent sensitivity, rapid response and stability.This device has the characteristics of simply installation and connection. Linear current or voltage output allows to interact with most display screens and instruments, controllers, recorders, and data recorders.There is a shielding output cable with a naked wire.Provide installation kits, which can be convenient to install walls or pipelines.Roewes HX93D and HX93A series variables are widely known and can provide remote and on -site relative humidity and temperature monitoring.Both series can output the linear current or voltage signal with a proportion of humidity or temperature measured. The relative humidity output uses temperature compensation, and the current output model can be used to place the transmitter almost away from any position away from the measurement equipment.The HX93DA type is equipped with a built -in dual display, which can indicate humidity and temperature at the same time.All models use thin -film solid capacitors to sensor the relative humidity, and use platinum 100ΩRTD to sensor the temperature.The self -contained stainless steel mesh filter is easy to remove for cleaning to protect the sensor.The installed screw is located in a strong polycarbonate shell, which is easy to contact. Polycarbonate shells are used to accommodate electronic components and according to the NEMA13 specifications to protect electronic components. Therefore, this brands temperature and humidity heater is very suitable for industrial fields.
Temperature and humidity transmitter price
The price of pipeline temperature and humidity sensor is about 350 yuan, high stability, easy to install, and simple maintenance operation; use flame retardant epoxy resin to solidify, completely waterproof, and can be used in the soil for a long time without being corroded; steel needles are high -quality materials.It can withstand long -term electrolytic and is not corroded by the soil; high measurement accuracy, reliable performance, less affected by soil salt content, can adapt to various soil quality; wide applications, low prices, suitable for Chinese national conditions.
The principle of temperature and humidity transmitter
The temperature and humid sensor is mainly composed of two parts: wet -sensitive capacitance and conversion circuit.Wetmine capacitors are composed of glass bottom, electrode, wet sensitivity materials, and electrodes.Two lower electrodes and wet -sensitive materials, two capacitors composed of upper electrodes are connected in series.Wetmine material is a polymer polymer that changes with the relative humidity of the environment with the relative humidity of the environment.When the environmental humidity changes, the capacity of the wet sensitivity component changes, that is, when the relative humidity increases, the wet -sensitive electricity capacity increases, otherwise decreases.The conversion circuit of the sensor converts the changes in the dampness capacitor into a voltage change, corresponding to the change of the relative humidity 0 to 100%RH, and the output of the sensor is 0 to 1V linear change.

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