Solinst 101 Water Level Meters

Water Level Meter
Model 101

For measuring the depth to water in wells, boreholes, standpipes, and tanks, Model 101 Water Level Meters are the industry standard for portable hand operated meters. They are sturdy, easy to use and read accurately to 1/100 ft. or each millimeter.

There are three versions to choose from. The Model 101 P7 Water Level Meter features a pressure-proof probe and laser marked PVDF tape. The Model 101 P2 Water Level Meter features an easy-to-repair probe and laser marked polyethylene tape. The 101M Mini Water Level Meter is compact and features narrow, laser marked polyethylene tape and a P10 (10 mm) weighted probe.

Also available, are the less expensive Model 102 Water Level Meter and 102M Mini Water Level Meters (Narrow Cable) for use in small diameter tubes, and the basic Model 101B Water Level Meter (see Model 102 and 101B Data Sheets). The Model 101D Water Level DrawDown Meter provides both depth to water and drawdown measurements using one probe (See Model 101D Data Sheet).

Water Level Meter Operating Principles

Model 101 Water Level Meters use corrosion proof stainless steel probes attached to permanently marked flat tape, fitted on a well-balanced reel. They are powered by a standard 9 volt battery.

The probes incorporate an insulating gap between electrodes. When contact is made with water, the circuit is completed, activating a loud buzzer and a light. The water level is then determined by taking a reading directly from the tape at the top of the well casing or borehole.

A sensitivity control allows the buzzer to be turned off while in cascading water, and ensures a clear signal in both high and low conductivity conditions.

P7 Probe

The P7 Probe is submersible the full length of the tape, therefore, you can measure total well depth in ideal conditions. The sensor at the tip of the probe provides consistent measurements with almost zero displacement. The tape seal plug design allows the probe to be quickly and easily replaced, if required.

PVDF Laser Marked Tape

The Model 101 P7 Water Level Meter uses extremely durable, PVDF flat tape, traceable to NIST and EU measurement standards. Each tape conductor contains 13 strands of stainless steel, and 6 strands of copper-coated steel, making the tape non-stretch and high in tensile strength and electrical efficiency. The tape has a thick dog bone design that prevents adherence to wet surfaces, and allows it to hang straight in application. It is also easy to splice. The 3/8″ (10 mm) tape comes with permanent laser markings every 1/100 ft. or each millimeter, in lengths up to 5000 ft. (1500 m).

Length Options

Solinst Model 101 P7 and P2, and 101M Water Level Meters are available on reels as shown, in the following standard lengths:

• Mini Reel
  • 65 ft. | 20 m
• Small Reel
  • 100 ft. | 30 m
  • 200 ft. | 60 m
  • 300 ft. | 100 m
• Medium Reel
  • 500 ft. | 150 m
  • 750 ft. | 250 m
  • 1000 ft. | 300 m
• Large Reel
  • 1250 ft. | 400 m
• X-Large Reel
  • 1650 ft. | 500 m
  • 2000 ft. | 600 m

101 P2 Water Level Meter

101M Mini Water Level Meter

The laser marked, narrow polyethylene flat tape is mounted on a convenient small reel that is light-weight and fits easily into a mini carrying case or backpack. The 1/5″ (5 mm) wide tape is accurately marked each millimeter or every 1/100 ft. The 101M Mini Water Level Meter is available in 20 m and 65 ft lengths.

Other Options

Carrying Cases: Mini, small and medium padded nylon carrying cases are available, as an optional extra. Their design has a convenient shoulder strap, zippered front pocket, zippered top, and a grommet in the base to prevent moisture build-up.

Power Reels: Power reels can be very useful to allow faster or less strenuous operation of longer lengths of tape. They are available as 12V or 110V.

Replacement Parts: Replacement probes, tapes and other spare parts are available.

Tape Guide/Datum

A tape guide is provided with each Meter. It protects the tape from damage on rough edges of well casing and ensures easy, consistent measurements, regardless of who takes the readings. It can also provide support on the casing, for small reels.

Power Winder and Lateral Winder

The Solinst Model 101 Power Winder allows ease of use when deploying longer lengths of tape. It is lightweight and easy to attach to the frame of small, medium and large Model 101 Water Level Meter reels (see Model 101 Power Winder Data Sheet). A standard drill provides power to the Power Winder, which turns the rollers that are in contact with the reel. The drill is used at various speeds, in forward and reverse, to turn the reel and unwind and rewind the tape.

Combine with a Solinst Model 101 Lateral Winder and wind your tape evenly back onto the reel every time (see Model 101 Lateral Winder Data Sheet).