Level measurement in boreholes, reservoirs and wells

What is a Smart Well level meter

The Smart Well SW1 level meter is a device for measuring water level in boreholes, tanks and dug wells. The SW1 level meter can measure the level of water up to 70m with a resolution of 1cm, depending on the probe used. The level meter is not designed to protect the pump.

How does a level meter work

The level meter consists of a probe and a control unit. Based on the data obtained from the probe, the unit displays the height of the water bar above the probe. The measurement is affected by the current atmospheric pressure, however, the deviation of the measurement, caused by a change in atmospheric pressure, can reach a maximum of ± 0.3 m compared to the actual level. Probe S3 is equipped with a compensating capillary and the measurement is thus not affected by atmospheric pressure.

Level meter components

The heart of the level meter is the control unit with a backlit LCD display, a button and a waterproof connector for probe connection. An integral part is the probe S1, S2 or S3 (varies according to order) made of stainless steel and non-hazardous materials. The package also includes all the material needed for assembly.

Level meter assembly

For boreholes, we recommend attaching the probe and cable to the pump tube to ensure measurement accuracy and prevent damage to the pump or probe when removing them from the borehole. The plastic holder and cable ties that are included in the package are used for this. The probe can only be hung in a tank or a well using the probe cable.

Thanks to the water resistance and battery power supply, the control unit can be placed however you see fit.

SW1 unit

The unit is the heart of the level meter and is controlled by a microprocessor. A well-readable LCD with backlight is used to display the measured values. A waterproof button that turns it on is located on the bottom. The power is provided by an alkaline 9V battery which lasts for minimum of 2 years of normal operation thanks to the automatic standby mode. A durable 78mm x 118mm x 54mm plastic box protects the electronic parts against mechanical damage and ingress of water.


Sonda je nedílnou součástí hladinoměru a měří výšku vodního sloupce nad sebou. Doporučujeme ji umístit do stejné výšky jako ochranné čidlo čerpadla. Pokud čerpadlo čidlo nemá, je vhodné sondu umístit přibližně 1m nad čerpadlo. V nabídce máme sondu S1 s rozsahem 0-40m a rozlišením měření 0,1m, sondu S2 s rozsahem 0-70m a rozlišením měření 0,2m a sondu S3 s rozsahem 0-10m a rozlišením 1cm. Pro běžné vrty postačuje sonda S1.

Possibility of expansion

The cable length of the S1 probe is 45m, 75m for S2 and 15m for S3. Taking into consideration the location of the control unit, however, the length might not be sufficient for all. This is the reason we offer extension cables of various lengths as well.

Level meter operation

Operation of the level meter is really easy and anyone can manage it after proper calibration and installation. After pressing the button, a quick check of the unit and the probe takes place. Afterwards, the current water level status and the remaining battery power are displayed for 15 seconds.

Why a level meter

Setting up a well is not an insignificant investment. When you have your own well, you expect it to function for years without any problems. If you treat it right, it will reward you with both quality water and long-term service. One of the essential factors is water level control. Excessive pumping can permanently damage both the well and the pump. Measuring the water level with a string is not an adequate method and an impossible one with boreholes. Any kind of manipulation can pollute the water. The graph shows the behavior of an average level of our borehole based on the seasons.

Smart Well out there

Feedback is as important for us as our customers' satisfaction.


Our list is not over with one probe. There is a wide range of accessories on offer to satisfy everyone's needs.


Power is provided by a 9V alkaline battery, which is why you don’t need to worry about the power supply. At the same time, the battery ensures trouble-free operation for more than 2 years.


Water resistance and safety is ensured by a plastic box with IP65 protection. The electronic circuit is thus safe from dust, rain and snow.


Contrasting LCD display with backlight guarantees readability in all lighting conditions.


The use of quality components ensures long-term reliability and functionality.


We offer free lifelong service for all our products.


All our products are manufactured in the Czech Republic.


The possibility of finally knowing how much water you have in your well anytime with 100% accuracy? Priceless.


- Easy installation
- Maintenance-free
- No operating costs
- FREE shipping

How to order?

Order the Smart Well level meter in our E-SHOP or contact us at:

Martin Carda: + 420 605 909 999 (CZ, EN)

E-mail: info@smartinventions.cz