Evaporation Sensor

1.Working Principle of Evaporation Sensor

Evaporation Sensor measures evaporation by calculating the change of the water surface in the evaporation dish. The double-layer structure prevents evaporation error caused by direct sunlight.The pressure measurement principle is applied to measure the weight change of the liquid in the evaporating dish, and then the page height is calculated to measure the evaporation amount. It can adapt to the water surface evaporation measurement in various environments, and is not affected by the freezing of the liquid. It overcomes the shortcomings of using the ultrasonic principle to measure the liquid level height, such as inaccurate measurement when freezing, easy damage to the sensor when there is no water, and low measurement accuracy.

2. Application scope of Evaporation Sensor

The water surface evaporation sensor is a sensor used to sense changes in water surface evaporation. It can observe the changing patterns of water surface evaporation in different time periods. It is suitable for meteorological observation, plant cultivation, seed cultivation, agriculture and forestry, geological survey, scientific research and other fields.

It can be used in conjunction with automatic water adding devices, data acquisition and sending devices, etc. to realize automatic monitoring of the evaporation process; it can also be used in combination with data acquisition and storage devices (recorders) to realize automatic storage of evaporation data; it can also be used in conjunction with rainfall sensors, data acquisition and sending devices, etc. to realize automatic observation and remote transmission of evaporation and rainfall processes.

3. Evaporation Sensor Features

1. It can prevent evaporation errors caused by direct sunlight, has higher measurement accuracy and faster response speed than products in the same industry;

2. The whole machine is made of 304 stainless steel, which is corrosion-resistant, rust-free, and has a beautiful appearance, ensuring the service life of the sensor;

3. The pressure measurement principle uses a high-precision weighing principle to measure the weight change of the liquid in the evaporating dish, calculate the liquid level, and thus measure the evaporation amount. The measurement is more accurate and the data is more scientific;

4. Double-layer protection design structure. The product adopts double-layer stainless steel design, which can isolate external interference and make the measurement results more accurate;

5. After power failure, the output data is still correct after power failure.

4. Evaporation Sensor Working and Storage Conditions

Working temperature: -40～85°C

Working humidity: 0～100%RH

Storage humidity: <80% (no condensation)

5. Evaporation Sensor Technical Parameters

Supply voltage: 12V DC

Measuring range: 0~190mm

Measurement accuracy: ±1%

Signal output: 485 Modbus-RTU

Response time: 200ms

Inner barrel diameter: φ200mm

Protection level: IP66

6. Evaporation Sensor Product Dimensions

VII. Evaporation Sensor Installation Guide

1. Notes on selecting the installation location

The equipment should be installed above the ground and on a cement base to prevent rainwater from flooding the chassis and flowing back into the equipment, thereby causing equipment short circuit or line failure.

2. Installation steps

Unpack the product and place the outer shell, inner tank and base on a level surface for installation. The installation steps are as follows:

A Remove the bottom screw

B Place the inner pot on the base tray

C Put the shell on the base chassis

D Turn the housing to align the bolt holes at the bottom of the housing with the bolt holes on the base tray, then insert the bolts and tighten them

E Fix the assembled equipment on the pre-made cement base