Solinst

101D Water Level DrawDown Meter

Dual-mode water level meter that switches between static water level and drawdown measurements with one toggle.

Same robust, submersible P7 probe as the 101 P7 Water Level Meter
Laser-marked flat tape with markings every 1/100 ft or millimetre, in lengths up to 1500 m (5000 ft)
Option to connect to a Model 410 Mk5 Peristaltic Pump for automated pumping

Quantity

Overview

The Solinst Model 101D Water Level DrawDown Meter has the qualities of the 101 P7 Water Level Meter, with the added feature of a drawdown mode. One toggle switches between static water level measurements in wells, boreholes, standpipes and tanks and drawdown monitoring, which is used to follow falling hydraulic head during low flow sampling, pumping and other aquifer and well tests. In water level mode the light and buzzer activate when the probe is submersed; in drawdown mode they activate when the probe is in air.

Typical applications

Measuring depth to water in wells, boreholes, standpipes and tanks
Monitoring drawdown during low flow groundwater sampling
Monitoring drawdown during well development and purging
Monitoring drawdown during dewatering applications
Monitoring drawdown during pumping, slug, hydraulic conductivity, step and other aquifer and well tests

Key Features

Static water level and drawdown modes in one meter, switched with one convenient toggle
Water level mode: light and buzzer activate when the probe is submersed; drawdown mode: they activate when the probe is in air
Battery test button checks the circuit in both water level and drawdown modes
Same robust, submersible probe as the 101 P7 Water Level Meter, with a protective shroud
Laser-marked flat tape with markings every 1/100 ft or millimetre, in lengths up to 1500 m (5000 ft)
Tape accuracy meets NIST and EU measurement standards
Non-stretch tape with a thick dog-bone design that prevents adherence to wet surfaces; easy to repair and splice
Replacement tapes are interchangeable with other meters
Option to connect to a Model 410 Mk5 Peristaltic Pump for automated pumping, using the DrawDown Link Cable Assembly (available separately)

Benefits

Automatic Control: With the DrawDown Link Cable Assembly (available separately) connected to a Model 410 Mk5 Peristaltic Pump, the meter can automatically control the pump based on the water level in the well.
Protect Your Pump: Ensures the pump intake remains submerged during purging or well development.
Streamline Low-Flow Sampling: Monitors the falling hydraulic head during low flow groundwater sampling.

Specifications

MEASUREMENT
Modes	Static water level and drawdown, selected with a Water Level/Draw Down switch
Water level mode	Light and buzzer activate when the probe is submersed
Drawdown mode	Light and buzzer activate when the probe is in air
Marking resolution	Every 1/100 ft or every millimetre
Zero measurement point	Near the tip of the P7 probe
Tape accuracy	Meets NIST and EU measurement standards
Sensitivity	Adjustable, on/off sensitivity dial

PROBE
Probe	P7 probe, with protective shroud
Size	16 mm dia., 137 mm long (5/8" x 5.38")
Weight	~128 g (4.5 oz)
Wetted materials (tape/probe)	PVDF, Santoprene, Delrin®, Viton®, 316 stainless steel
Probe pressure rating	Fully submersible to depth of all tape lengths

TAPE
Tape	Laser-marked flat tape, 3/8" (10 mm) wide
Tape lengths	Up to 1500 m (5000 ft)

REEL AND POWER
Reel IP rating	IP64 (dust and splash proof)
Operating temperature of reel	-20 °C to +50 °C
Submerged operating temperature (tape/probe)	-20 °C to +80 °C
Power	9 V alkaline battery
Controls	On/off sensitivity switch, Water Level/Draw Down switch, light, buzzer, battery test button, brake
Tape guide	Provided with each meter; fits well casing 2" (50 mm) diameter or larger; measuring point offset 6 cm (2/10 ft)

STANDARD REEL LENGTHS
Small reel	30 m / 100 ft 60 m / 200 ft 100 m / 300 ft
Medium reel	150 m / 500 ft 250 m / 750 ft 300 m / 1000 ft
Longer lengths	Available up to 1500 m (5000 ft)

ORDERING CODES
LM2	Tape in feet and tenths, with markings every 1/100 ft
LM3	Tape in meters and centimeters, with markings every mm

OPTIONS
DrawDown Link Cable Assembly	Available separately, for connecting to a Model 410 Mk5 Peristaltic Pump
Winders	Model 101 Power Winder and Model 101 Lateral Winder
Carrying cases	Optional small and medium padded nylon carrying cases

Drawing

Downloads

101D Water Level DrawDown Meter Datasheet (EN)	Download101D Water Level DrawDown Meter Datasheet (EN)
101D Water Level DrawDown Meter User Manual (EN)	Download101D Water Level DrawDown Meter User Manual (EN)