Level Measurement Devices

Water Level Meters
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 two versions to choose from. The Model 101 P7 Water Level Meter features a pressure-proof probe rated to 500 psi and laser marked PVDF flat tape.
The Model 101 P2 Water Level Meter features an easy-to-repair probe and heat embossed polyethylene flat tape.Also available, are the less expensive Model 102and 102M Coaxial Cable Water Level Meters for use in small diameter tubes, and the basic Model 101B Water Level Meter

  • Markings each 1/100 ft. or millimeter
  • Traceable to national standards
  • Sensitivity adjustable to conductivity
  • Probes avoid false readings in cascading water
  • Permanent laser markings
  • Non-stretch PVDF flat tape with stainless steel conductors
  • Non-stretch PVDF flat tape with stainless steel conductors
  • Rugged, corrosion proof components
  • Strong, flexible tapes
  • Easy to splice and repair
  • PVDF replacement tapes are interchangeable with other meters
Length Options
Solinst Model 101 P7 and P2 Water Level Meters are available on reels as shown below, in the following standard lengths:

101B Water Level Meter

The Model 101B Water Level Meter is a basic, low cost instrument for portable depth to water measurements. It uses polyethylene flat tape that is permanently heat embossed every centimeter. Tape length options are 30, 60, and 100 m. The stainless steel P1 Probe is extremely robust and is 1/2" (12.7 mm) in diameter. The sturdy reel and handle make measurements easy. The Meter is powered by one 9V battery, which is replaceable by accessing the reel hub.

102 Water Level Indicator

Measure Water Level & Draw Down
  • 4 mm (0.157") or 10 mm (3/8") diameter stainless steel probes
  • P10 has segmented weights for flexibility
  • LED Light and loud buzzer indicates water level
  • Adjust sensitivity to suit your application
The Laser Marked Model 102 Water Level Indicator is designed to accurately measure groundwater levels in small diameter applications.
The 102M Mini Water Level Indicator is available (lengths of 80 ft or 25 m

Interface Meter - Model  122

Solinst Oil/Water Interface Meters give clear and accurate measurements of product level and thickness in wells and tanks.
Determination of both light (floating) non-aqueous phase liquids (LNAPL) and dense (sinking) non-aqueous phase liquids (DNAPL) is quick and easy. The factory-sealed probe is pressure proof (up to 500 psi) and tapes are available in a range of lengths from 100 - 1000 ft (30 - 300 m).

The 5/8" (16 mm) diameter probe allows easy access through tight spaces and into narrow wells. The probe is designed for use in various monitoring applications. 122M Mini Interface Meters also available, see 122M Data Sheet for more information.

Model 122 Oil Water Interface Meters

The Model 122 Oil/Water Interface Meter is designed to measure floating or sinking hydrocarbon layers in water (LNAPL and DNAPL).
The Model 122 P8 5/8" (16 mm) narrow pressure-proof probe clearly detects when it enters product or water, with an accuracy of 1/200 ft. or 1 millimeter. It is excellent in almost all product monitoring applications.

It uses optical refraction and electrical conductance to determine product and water interfaces. A continuous light and tone indicate non-conductive product. Water is indicated by intermittent signals.
The depths of detected water and product layers are read off PVDF flat tape, which is laser-marked every 1/100 ft. or each millimeter. The durable, corrosion-resistant tape is easy to clean and ideal to use when measuring in wells, tanks, at refineries, landfills or remediation sites.

The Model 122 Interface Meters are certified intrinsically safe for use in explosive environments, and are ATEX certified.
One 9V battery provides a minimum 120 hours of life. The electronics have automatic circuitry testing and they shut off after 10 minutes.

Model 107 TLC Meter
(Temperature, Level, Conductivity)

The Model 107 TLC Meter enables accurate profiling of water temperature and conductivity in aquifers, and open water bodies.

Using platinum electrodes, the 3/4" (19 mm) diameter TLC Probe measures conductivity readings from 0 - 80,000 μS/cm. The readings are shown as electrical conductivity standardized to 25C (Specific Conductance). Accuracy is 5% or 100 μS, whichever is greater.

Conductivity and associated temperature readings, from -15C to +50C (23F to 122F), are taken from the LCD display on the reel.

Profiling depths are read from the Solinst PVDF laser-marked flat tape, up to 1000 ft. (300 m). The tape is accurately laser marked every 1/100 ft. or each millimeter, and is certified traceable to national standards.

A standard 9V alkaline battery gives up to 90 hours of on-time and the electronics have an auto-off after 8 minutes of inactivity. Calibration is simple, with a single, or up to 4-point calibration option.

Salinity issues are prevalent worldwide, including saltwater intrusion due to over-pumping of wells and road salt contamination of municipal drinking water wells. The TLC meter is ideal to use in monitoring these situations, or for providing a general indication of water quality in any application.

Model 103 Tag Line

The Model 103 Tag Line is a convenient option for measuring well depth during well construction and backfill layers during monitoring well completion. It is an ideal tool to measure sand and bentonite layers when installing Model 403 CMT Multilevel Systems or Model 401 Waterloo Multilevel Systems.

The Tag Line uses a tag weight attached to a durable polyethylene coated stainless steel wireline, or PVDF flat tape, mounted on a sturdy freestanding reel. Cable markings are accurately laser marked every 1/4 ft. or 5 cm. Tape markings are every 1/100 ft. or each mm.
The cable has a minimum break strength of 270 lbs (122 kg), and comes in lengths up to 1000 ft. (300 m). The tape has a break strength of greater than 220 lbs (100 kg), and also comes in lengths up to 1000 ft. (300 m).