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Solinst 122 Interface Meter

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Available for Rent, price on enquiry.

Solinst 122 Interface Meter

Price on request

The Interface Meter is perfect for determining both water level and NAPL contamination within wells.

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SKU: 122-IM | Categories: , Tag:


The Interface Meter is perfect for determining both water level and NAPL contamination within wells. It consists of a probe attached to a polyethylene tape at one end, and at the other end a reel containing the electronic components of the instrument.

Two stainless steel conducting cables run down the length of the tape from the reel to the probe. The probe incorporates an infra-red beam and a detector receiving the light signal.

When the probe is submerged in any liquid the light is refracted away from the detector causing the system to go into alarm mode. If the layer is NAPL (conductivity less than 50uS/cm) the alarm will sound with a steady tone and light.

When the probe hits water (conductivity greater than 50uS/cm) the infra-red alarm circuit is overridden and the conductivity alarm is activated, noticeable by a rapid intermittent tone and flash of light.

The 122 Interface Meter measures water and product level and thickness, accurately to 1.0 millimeter or 1/200 ft. It measures floating and sinking hydrocarbon, non-aqueous product layers (LNAPL and DNAPL), using a 16 mm (5/8″) diameter pressure-proof probe. The 122 is certified intrinsically safe, and is ATEX certified.

Readings are taken from accurate laser marked flat tape up to 300 m (1000 ft). The tape is very easy to clean. The 122 is rugged and simple-to-use.

Additional information


1.0 mm


100m, 150m, 250m, 300m, 30m, 400m, 500m, 600m, 60m


Manual Measurement

Available for Rent






High Quality Groundwater and Surface Water Monitoring Instrumentation

In 1975, Solinst began as a small reseller of geotechnical instruments. Through the early 1980’s, founder Doug Belshaw reshaped Solinst into a successful manufacturer of high quality groundwater and surface water monitoring equipment. Doug started by producing the Model 101 Water Level Meter, which provided the first, flexible polyethylene tape with an engineering scale (marked in tenths and feet).

Over the next 30 years, the Solinst product line developed into a full range of instruments, sold worldwide. Products include water level meters, interface meters, groundwater samplers, multilevel groundwater monitoring systems, remediation equipment, drive-point piezometers, and dataloggers and telemetry. In 1996, Solinst introduced the Levelogger® water level datalogger – the first combined absolute pressure sensor and datalogger in the industry.

As the Solinst brand grew, the company expanded to its current home in Georgetown, Ontario. With Jim Pianosi now as president, Solinst remains a successful and stable family-owned business in Canada.

HydroTerra has been working with Solinst as their exclusive representative in Australia for over a decade. Clients in Australia benefit greatly from the long-term collaboration between the two companies, and the superior technical and sales support they receive from such an experienced distributor.