Basic principle of intelligent control system in greenhouse

This series of products adopts highly integrated temperature and humidity sensor chip, and the digital output of the chip has been calibrated in full range. It adopts patented CMOSens technology to ensure high reliability and excellent long-term stability of products. The sensor includes capacitive polymer humidity sensor and temperature sensor made of energy gap material, which are designed on the same chip as 14 bit A/D converter and serial interface circuit. The sensor has excellent quality, ultra-fast response, strong anti-interference ability and high cost performance. Each sensor chip is calibrated in an extremely accurate thermostatic chamber, based on the mirror condensation dew point meter. The calibration coefficient obtained by calibration is stored in the OTP memory of the chip itself in the form of a program. Through two-wire serial interface and internal voltage adjustment, peripheral system integration becomes fast and simple. Technical parameters:

Power supply voltage: 12V ~ 24v DC

Output signal: 4 ~ 20ma

Output load: 500ω

. Illumination range: 0 ~ 100 lux

Reaction time: 100 ms

. Ambient temperature: -20 ~ 80℃

Accuracy: 5%

Functions and features:

Small size and convenient installation.

The shell has reasonable structural design and long service life.

Good sealing performance

High measurement accuracy and good stability.

Long transmission distance and strong anti-interference ability.

Reasonable structural design and good appearance quality.

Scope of application:

It can be widely used for light intensity measurement in environment, greenhouse, laboratory, aquaculture, architecture, high-grade buildings, industrial workshops and so on. Power supply: 24V DC/AC (10%)

Power consumption: average

Range: 0~2000 ppm

Accuracy: 50 ppm+ 3% of reading

Temperature drift: 0.2 fs/℃

Stability: drift

Repeatability: drift

Range: 0 ~ 30m/s

Power supply voltage: 5V~24 V DC

Output signal: pulses (each pulse corresponds to 0.66m/s).

Accuracy: 1 m/s

Load capacity: ≤500ω

Starting wind power: 0.2m/s Technical parameters:

Power supply: DC 12 ~ 24V

. Signal output:

Temperature: 0 ~ 20ma corresponds to -30℃ ~ 70℃.

Temperature accuracy: 0.2℃

Humidity: 0 ~ 20ma corresponds to 0 ~ 100%.

Humidity accuracy: 3%

Communication mode: 485 communication, transmission distance

. Communication rate: 9600, n, 8, 1.

Communication protocol: MODBUS protocol.

Functions and features:

. Small external volume design, convenient installation.

Fast response speed

Strong anti-interference ability

Long service life

Fully calibrated outputs can be used interchangeably without calibration.

Based on on-demand measurement, the power consumption is extremely low and the stability is good. Power supply: 5V- 12V.

Output signal: switch

Impact time: 10 second technical parameters:

Diameter of rain bearing: φ 160mm.

Measuring range: ≤ 8mm/min

Resolution: 0.5 mm

Error: 4%

Weight: about 3 kg

Output signal: single reed switch on and off, 4PLUS/MM (anti-interference resistance100Ω, capacitance 0.01Ω).

Working environment temperature: -20 ~ 80℃

Functions and features:

High precision and good stability

Small size and convenient installation.

Good linearity, long transmission distance and strong anti-interference ability

The support system of skip parts is well-made, with small friction torque, sensitive overturning, stable performance and reliable work.

The instrument shell is made of stainless steel, which has strong antirust ability and good appearance quality.

The rain mouth is made of stainless steel skin, which has high finish and small error caused by accumulated water.