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- [ AXSYS Datalogger ]
- [ Levelogger Series ]
- [ Pressure Transducers:
SDI Depth Sensor ]
- [ Pressure Transducers:
Submersible Depth
Transmitter II ]
- [ Type A-71 Chart
Recorder ]
- [ Type F Water Level
Recorder ]
- [ Unidata 6541 Precision
Water Level instrument ]
- [ Water Level Meter ]

For measuring the depth of water in wells, boreholes, and standpipes, the Model 101 Water Level Meter is the most accurate and reliable of the Solinst meters. It is easy to operate and read to 1/100 ft or each millimeter.

Temperature profiling accessories are available for models fitted with a P4 probe. Also available is the less expensive Model 102 Coaxial Cable Water Level Meter for use in small diameter tubes.

Operating Principles

The Model 101 Water Level Meter uses a choice of probe designs, attached to a permanently marked polyethylene tape, fitted on a well-balanced reel. It is powered by a standard 9 volt battery housed in an easy-access battery drawer. The conductors embedded within the tape each have seven strands of stainless steel for strength and flexibility.

The probe incorporates an insulating gap between electrodes. When contact is made with water, the circuit is completed, activiting 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.

Tape Specifications

The high quality polyethylene tape reels smoothly, remains flexible and hangs straight in the well, irrespective of temperature. Permanent markings each millimeter or 1/100 ft. allow accurate readings, traceable to national standards.

Stranded stainless steel conductors resist corrosion, provide strength and are non-stretch. They make the tape very easy to repair and splice. The dog-bone design avoids adherance to wet surfaces. Markings are permanently impregnated onto one side of the tape and are available in your choice of scale or with a combination of scale.

• M2 Feet and tenths: with markings every 1/100 ft
• M3 Meters and centimeters: with markings every mm.
• N2 and N3 As below, but on the narrow 1/4" (6mm) tape for the Mini 101 Water Level Meter.

Features

• Accurate:
  Markings each 1/100 ft or millimeter
  Traceable to national standards
  Sensitivity adjustable to conductivity
  Shielded probes to avoid false readings
• Reliable:
  Permanent, heat impregnated markings
  Non-stretch stainless steel conductors
• Long life:
  Rugged, corrosion proof components
  Strong, flexible tape, is easily spliced

Reels

Standard reels are ergonomically designed for good balance and ease of use, with a stand-alone design, convenient carrying handle and an excellent brake.

They are robust and smooth running. The battery is housed in a convenient battery drawer and each reel has probe holder and brake. The reels are equipped with an on/off sensitivity switch, light, buzzer, and a battery text button.

The mini reel is sturby, yet very compact and easy to carry.

Length Options

Solinst Model 101 Water Level Meters are available on reels as shown at right, in the following standard lengths:

• Mini Reel (narrow tape)
  30 ft (10m)
  65 ft (20m)
• Small Reel
  100 ft (30m)
  150 ft (50m)
  200 ft (60m)
  250 ft (80m)
  300 ft (100m)
  400 ft (120m)
• Medium Reel
  500 ft (150m)
  650 ft (200m)
  750 ft (250m)
  1000 ft (300m)
• Large Reel
  1250 ft (400m)
  1500 ft (450m)
  1650 ft (500m)
  2000 ft (600m)
• XL Reel
  2500 ft (750m)
  3000 ft (900m)

Tape Guide/Datum

A tape guide is provided with each standard Water Level 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 reel support on the casing, as shown above.

Other Options

• Power Reels: Power reels can be very useful to allow faster or less strenuous operation of longer lengths of tape. The 110 volt power reels are available on request.
• Carrying Bag: Padded nylon carrying bags are available, as an optional extra. The sturdy design has a convenient shoulder strap, zippered front pocket, zippered top, and a grommet in the base to prevent moisture build-up.
• Replacement Parts:  Replacement probes, tapes with probe and other spare parts are available. Meters can also be returned directly to Geneq inc.

Probe Options (standard tape)

All probes are designed to reduce or eliminate problems with cascading water.

• P2 Stainless Steel: with a neoprene strain relief.
  Size: 0.5"dia. by 7.5" long (12.7mm x 190mm).
• P4 Environmental: stainless steel probe required for use of T4 profiling sleeves. Pressure-sealed probe pulls apart for easy cleaning and decontamination and to accept T4 sleeve.
  Size: 0.625" dia. by 8.625" (15.9mm x 220mm).
• P5 Submersible: stainless steel, leak-proof probe. Simple design is easy-to-clean, hangs straight in the well, and has almost zero water displacement.
  Size: 0.5" dia. by 8.625" long (12.7mm x 220mm).
• T4 Temperature sleeves allows profiling of temperature with depth. Sleeve enclosing a thermistor slips over the P4 probe body. Readout plugs into reel. The T4 Sleeve may be used with the Solinst digital multimeter.
  Range: -50°C to 150°C
  Depth: 1250ft (400m)
  Size: 0.625" dia. by 8.75" (15.9mm x 222mm)

Narrow Mini 101
An accurate tape for use in narrow diameter applications.

The Mini 101 Water Level Meter is ideal for use in narrow diameter applications as small as 3/8" (10mm).

The narrow 1/4" (6mm) tape is mounted on a convenient small reel that is light weight and fits easily into a backpack. The accurate, flat white tape is marked each 1/100 ft or each mm.

The Mini 101 is available in 30 ft, 65 ft, 10m and 20m lengths with a choice of the 1/4" (6mm) P1 probe, or the heavier 3/8" (10mm) P2 probe.