What Is A Deep Well Water Level Sensor?

Borehole Water Level Measurement - Deep Well Water Level Sensor

Many wells are between 10 and 60 feet deep, while some can reach depths of 1000 feet. Therefore, deep well level sensors are the best choice when customers need to measure water levels in deep wells. Sino-inst deep well level sensors can measure depths up to 6561.68 feet (2000m). These level sensors are inexpensive, versatile, and easy to install.

A deep well level sensor is a device specifically designed to measure and monitor water levels in deep wells or boreholes. These sensors can employ a variety of technologies. These include pressure measurement, ultrasonic sensing, and even simple probes. They can withstand the harsh environments of deep well applications and provide accurate and reliable water level measurements.

RFQ

Principle of the Deep Well Water Level Sensor

The working principle of a deep well water level sensor is based on hydrostatic pressure. Hydrostatic pressure refers to the pressure exerted by the water column above the sensor. Water pressure is directly proportional to the water level. Therefore, by measuring water pressure, the water level can be indirectly measured.

When the liquid pressure in the deep well acts on the sensor probe, the water level will rise or fall. The change in static pressure exerted by the liquid on the probe is converted into an electrical signal. Then, through temperature compensation and signal processing, it is converted back into a standard electrical signal.

The formula for liquid surface pressure is: P = ρgh + P1, where:

P: Sensor liquid surface pressure.
ρ: Density of the measured liquid (default value during debugging is 1 g/cm³)
g: Gravitational acceleration (default value during debugging is 9.8 m/s²)
P1: Internal pressure during encapsulation (≈101.3 kPa)
h: Depth of sensor immersion in liquid.

Types of Well Water Level Sensors

**Submersible Level Transmitter 0-10m-50m-200m**

**Stainless Steel Submersible Level Sensor | High Temperature – Corrosive Liquid**

**Deep Well Water Level Sensor | Up to 200~2000mH2O**

**Chemical Level Sensor with PTFE Probe-Submersible**

Submersible Level Transmitters

Submersible level sensors are devices that measure liquid height based on hydrostatic pressure. They employ a high-performance diffused silicon piezoresistive pressure sensor as the measuring element. This pressure is directly proportional to the liquid depth.

The signal is converted into a standard (current or voltage) signal output by a signal processing circuit. The output signal has a linear relationship with the liquid level depth, thus allowing for the measurement of liquid level depth.

Submersible level transmitters typically have a measurement range of up to 200 meters. They are widely used in industrial containers, storage tanks, reservoirs, and other similar applications.

In addition, Sino-inst offers stainless steel submersible level sensors. This sensor is a pneumatically guided level transmitter. It can be used to measure the level of high-temperature, corrosive, and wastewater liquids. It also supports multiple signal outputs, including 4~20mA, 1~5V, and RS485.

Features

Accuracy up to ±0.25%FS, supports multiple measurement ranges (0~500 meters) for customization.
Stable and reliable performance, usable in harsh outdoor environments.
Waterproof and corrosion resistant. Operates stably in media/ambient temperatures from -20 to 85℃.
Supports 4~20mA current, voltage, digital signal, and wireless transmission (such as GPRS) output.
Equipped with a solid-state structure and no moving parts, offering a lifespan of over 10 years.
Its measurement range is up to 200~2000mH2O.

Deep Well Water Level Sensor

The deep well water level sensor is a submersible level transmitter specifically designed for deep well measurement applications. Its measuring range is up to 200~2000 mH2O. The temperature range covers -40 to 100℃. It also supports outputs of 4~20mA, 4~12~20mA, and RS485.

Compared to ultrasonic well depth sensors, deep well water level sensors offer a larger customizable measuring range and a more affordable price! They are widely used in deep well level measurement, groundwater level monitoring, and geothermal well measurement.

Features

Utilizes an OEM pressure sensor with a stainless steel isolating diaphragm as the signal measuring element.
Features internal sealing and a dual-isolation chamber design.
Enhanced by lightning strike and open-circuit interference protection, providing strong anti-interference capabilities.
Excellent stability, condensation-proof, and liquid-proof.
Low temperature drift coefficient and high accuracy.
Customers can assemble the cable themselves.

Chemical Level Sensor with PTFE Probe-Submersible

Chemical level sensors with PTFE probes are suitable for open-type hydrostatic level measurement. They are mainly used to measure highly corrosive liquids such as hydrochloric acid, sulfuric acid, and nitric acid, as well as seawater, chemical wastewater, and electroplating wastewater.

This chemical level sensor consists of a PTFE gas collection cylinder, a PTFE capillary tube, and a junction box. It features high corrosion resistance and wide applicability. It can be used for level measurement of high-concentration strong acids and alkalis in various industries.

Like other hydrostatic level sensors, the Sino-inst submersible chemical level sensor with a PTFE probe uses the hydrostatic method for measurement.

Features

Utilizes a diffused silicon piezoresistive sensor.
The probe is made of corrosion-resistant PTFE material.
An LCD display is optional.
The probe features an insertion-type measurement method for easy installation.
Threaded or flange mounting options are available.
The sensor itself features automatic temperature compensation.

Main Features of Deep Well Water Level Sensor

High measurement accuracy

The measurement accuracy of deep well water level sensors can reach ±1 cm. They can capture minor water level fluctuations.

Strong environmental adaptability

The measurement range of deep well water level sensors is 0 to 200 to 500 to 1000 to 2000 mH2O. The housing of deep well water level sensors is made of 316L stainless steel or engineering plastics. They can withstand temperature differences from -40°C to 100°C and strong corrosive environments. Please provide the text you would like translated.

Waterproof design

Deep well water level sensors usually have a waterproof function. This enables them to accurately measure water levels at different depths.

Multiple output options

Deep well water level sensors typically offer multiple output options. For instance, analog signals and digital signals are common. Analog signals are often 4-20mA current signals or 0-5V voltage signals. Some models support RS485 communication protocol for digital signals.

Applications of Deep Well Water Level Sensor

Water resource management

Deep well water level sensors are mainly used to monitor water level changes in deep wells, geothermal wells, etc. They can record water level data in real time and upload it to the platform.

Groundwater monitoring

Deep well water level sensors can be used to monitor changes in groundwater levels. They can assess the health of aquifers and manage water resources.

Industry and environmental protection

Deep well water level sensors can be used in industrial wastewater and sewage treatment. Monitoring liquid level changes can optimize the process flow. Please provide the text you would like translated.

Irrigation and Agriculture

In irrigation systems, deep well water level sensors can ensure that the water level in agricultural irrigation systems is appropriate. This can optimize water usage and crop growth, and reduce water waste.

Environmental Monitoring

Deep well water level sensors can be used in environmental research to track the water levels of natural or artificial wells for ecological studies or conservation efforts.

How to Check The Well Water Level?

Common Measurement Methods:

Rope Method
A graduated conductive rope (such as a single-strand wire) is connected to a counterweight and a multimeter, and lowered into the well. When the multimeter detects continuity, the reading is the water level depth.

This method is suitable for temporary monitoring or when equipment is insufficient; it is low-cost and simple to operate.

Hand Probe Method
A probe is directly inserted into the well, and the water level is estimated by the exposed length. This method can quickly determine shallow water levels.

Instrument Monitoring Method
This typically uses contact instruments, such as hydrostatic sensors, which automatically record data based on changes in water pressure. This method has an error of less than 1 cm, supports a 2000-meter range, and is suitable for long-term monitoring.

Installation and Maintenance Recommendations for Deep Well Water Level Sensors

Installation

The following steps should be followed when installing a deep well water level sensor:

Select an appropriate installation locati0n. The sensor should be installed at a position where the groundwater level is relatively stable.The monitoring well should avoid areas with sediment accumulation.
2. Drill a hole. The diameter of the hole should be larger than the outer diameter of the sensor. This will facilitate the smooth lowering of the sensor.
3. Install the sensor. Then place the sensor in the drilled hole. Use a well wall fixing frame or cable clamps to securely fix the equipment.
4. Test the sensor. After installation, calibrate the equipment’s zero point. Compare the measured data with manual measurements to adjust the error to within ±0.25%F.S. Test the automatic data collection function and check the completeness and continuity of the data.

Maintenance

Maintaining the deep well water level sensor requires following these steps:

1. Regularly inspect the sensor’s appearance. Check for damage or corrosion.

2. Regularly clean the sensor. Regularly clean the filter and the sensor exterior, and check for aging of the IP68 protection rating seals. Stainless steel protective sleeves are required for downhole installations.

3. Regularly calibrate the sensor. Return it to the factory for calibration annually or perform on-site comparison using a standard water pressure calibrator. Allow the equipment to stand for 24 hours before calibration.

4. Check the wireless transmission module signal strength. Ensure a stable power supply voltage (supports DC 6-30V wide voltage range).

FAQ

Water level and temperature measuring instrument

Well water levels can be measured using mechanical and electronic methods.

The mechanical method involves inserting a measuring tape with a reading into the well. Once the probe reaches the bottom, the tape is retracted, and the water level is read from the watermark.

The electronic method uses a submersible level transmitter. The probe is placed into the well. After the probe reaches the bottom, the transmitter is powered on. The submersible level transmitter will then display the real-time water level. Furthermore, the measurement accuracy is higher and more accurate than the mechanical method.

Yes, You can measure the well water level yourself using tools, such as our submersible level transmitter. It’s easy to install and provides accurate measurements.

There are many types of water level sensors, such as ultrasonic level meters, radar level meters, submersible level transmitters, and float level transmitters. Most level sensors have good measurement accuracy. For example, submersible level transmitters have an accuracy of 0.5%, while radar level meters can achieve an accuracy of ±2mm.

There are many types of water level sensors, each employing different working principles. Examples include ultrasonic water level meters, radar water level meters, float water level transmitters, and submersible level transmitters.

Here, we’ll take a submersible level transmitter as an example. It operates on the principle that the hydrostatic pressure of the measured liquid is proportional to its height. It uses the piezoresistive effect of diffused silicon or ceramic sensing elements to convert the hydrostatic pressure into an electrical signal. After temperature compensation and linear correction, it is converted into a 4-20mA DC standard current signal output.

Specifically, the pressure of a liquid is proportional to its density and the local gravitational acceleration. The formula is: P = ρ·g·H + P0, where P is the pressure applied to the sensor, ρ is the liquid density, g is the gravitational acceleration, H is the liquid depth, and P0 is the atmospheric pressure.

Since boreholes are generally small, submersible deep well level sensors are recommended. Probe sizes can be customized, with a minimum of 19mm and a maximum measurement range of 2000m. This meets the needs of most drilling water level measurements.

To clean a water flow meter, we recommend disconnecting the power first. Then remove the flange bolts and remove the flow meter from the pipe. Then clean the internal body of the flow meter. Be careful not to touch the inside of the sensor with hard objects.

The internal structure of water level sensors varies depending on the type.

For example, a submersible level meter mainly consists of a probe, cable, and display (transmitter). Inside the probe is a pressure sensor that detects water pressure. The cable transmits the signal. The display processes the signal, displays the water level, and outputs an electrical signal.

The internal structure of a radar level meter is different. Radar level meters are non-contact measurements and do not have a probe. They mainly consist of an antenna and a display (transmitter). The antenna emits and receives radar electromagnetic waves. The display processes the signal, displays the real-time water level, and outputs analog or digital signals.

The measurement accuracy of ultrasonic level sensors is generally around 0.3%. The specific achievable accuracy is also related to the operating parameters. For example, water vapor can affect the measurement of ultrasonic level meters and reduce accuracy.

There are many types of sensors capable of measuring water levels. The main types include:

Submersible hydrostatic level sensors;
Radar level meters;
Ultrasonic level meters;
Float level transmitters;
Magnetostrictive level transmitters;
Capacitive level transmitters;
Portable ultrasonic depth sounders, etc.

What Is A Deep Well Water Level Sensor?

Principle of the Deep Well Water Level Sensor