piezometers and

pressure transducers
model 4500 series

Front to back Model 4500C, 4500S, 4500H, 4500DP and 4500HD Vibrating Wire Piezometers (front to back).

applications operating principle

For the measurement of: The transducer uses a pressure deflections of the diaphragm and Piezometers incorporate a porous filter
„ Ground water elevations sensitive diaphragm with a vibrating changes in tension and frequency stone ahead of the diaphragm, which
„ Pore water pressures wire element attached to it. The of the vibrating wire. The changing allows the fluid to pass through
„ Pump tests diaphragm is welded to a capsule frequency is sensed and transmitted but prevents soil particles from
„ Uplift pressures in which is evacuated and hermetically to the readout device by an electrical impinging directly on the diaphragm.
dam foundations sealed. Fluid pressures acting upon coil acting through the walls of
„ Hydraulic pressures in tanks the outer face of the diaphragm cause the capsule.
and pipelines
„ Wick drain efficiency advantages & limitations
„ Water pressures behind
The 4500 Series Vibrating Wire Standard porous filters are made more maintenance then unvented
tunnel linings Piezometers and Pressure Transducers from sintered stainless steel. High air- types, since moisture may find its way
have outstanding long-term stability entry ceramic filters are also available. inside the transducer and ruin it.
and reliability, and low thermal zero Vented piezometers, designed to For use in seawater and other
shift. Cable lengths of several eliminate the effect of barometric chemically aggressive environments,
kilometers are no problem and the pressure changes on water level corrosion resistant and high
frequency output signal is not measurements, are also available. temperature 4500 models are
affected by changing cable The space inside the transducer is also available. Refer to the 4500CR
resistances (caused by splicing, connected via a tube (integral within and 4500HT datasheets for
changes of length, terminal contact the cable) to the atmosphere. A more information.
resistances, etc.), nor by penetration chamber containing desiccant
of moisture into the electronic circuitry. Where measurements of rapidly
capsules is attached to the outer changing pressures are required,
A thermistor, located in the end of this tube to prevent moisture the 4500 series piezometers and
housing, permits the measurement from entering the transducer cavity. pressure transducers can be read
of temperature at the A length of standard cable is spliced using the CSI Dynamic VW Analyzer²
piezometer location. onto the end of the readout cable to (or similar). Alternatively, the 3400
All-stainless steel construction and allow for a standard connection. series piezometers and pressure
evacuation of the capsule 1 guarantees Vented piezometers are better transducers (semiconductor type)
a high level of corrosion resistance. suited for water level monitoring could be considered.
Integral gas discharge tubes inside applications, and typically not 1
Evacuation does not apply to vented models.
2
https://www.campbellsci.com/dynamic-vibrating-wire
the main housing protect against intended to be used to monitor pore
lightning damage. pressures. Vented piezometers require

www.geokon.com/4500-Series
technical specifications
Temperature Thermal Diaphragm Length ×
Model Standard Ranges Over Range Resolution Accuracy¹ Linearity Range² Zero Shift Displacement Diameter Mass

4500S 350, 700 kPa; 1.5 × rated pressure 0.025% F.S. ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.05% F.S./°C < 0.001 cm³ at F.S. 133 × 19.1 mm 0.12 kg
1, 2, 3 MPa
4500SH 350, 700 kPa; 1, 2, 3, 1.5 × rated pressure 0.025% F.S. ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.05% F.S./°C < 0.001 cm³ at F.S. 194 × 25.4 mm 0.44 kg
5, 7.5, 10, 20 MPa
4500SV 350, 700 kPa 1.5 × rated pressure 0.025% F.S. ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.05% F.S./°C < 0.001 cm³ at F.S. 146 × 19.1 mm 0.20 kg
4500AL/ALV 70, 170 kPa 1.5 × rated pressure 0.025% F.S. ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.1% F.S./°C < 0.001 cm³ at F.S. 133 × 25.4 mm 0.25 kg
4500B 350, 700 kPa; 1.5 × rated pressure 0.025% F.S. ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.05% F.S./°C < 0.001 cm³ at F.S. 133 × 17.5 mm 0.10 kg
1, 2, 3 MPa
4500BV 350, 700 kPa; 2 MPa 1.5 × rated pressure 0.025% F.S. ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.05% F.S./°C < 0.001 cm³ at F.S. 133 × 17.5 mm 0.10 kg
4500C 350, 700 kPa 1.5 × rated pressure 0.05% F.S. ±0.1% F.S. < 0.5% F.S. −20 °C to +80 °C < 0.05% F.S./°C < 0.001 cm³ at F.S. 165 × 11 mm 0.09 kg
4500DP 70, 170, 350, 700 kPa; 1.5 × rated pressure 0.025% F.S. ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.05% F.S./°C < 0.001 cm³ at F.S. 187 × 33.3 mm 0.90 kg
1, 2, 3 MPa
4500HD 70, 170, 350, 700 kPa; 1.5 × rated pressure 0.025% F.S. ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.05% F.S./°C < 0.001 cm³ at F.S. 203 × 38.1 mm 1.50 kg
1, 2, 3, 5, 7.5 MPa
4500H³ 70, 170, 350, 700 kPa; 1.5 × rated pressure 0.025% F.S. ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.05% F.S./°C < 0.001 cm³ at F.S. 140 × 32 mm 4 0.30 kg
1, 2, 3 MPa 140 × 25.4 mm
4500HH³ 5, 7.5, 10, 20, 35, 1.5 × rated pressure 0.025% F.S. ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.05% F.S./°C < 0.001 cm³ at F.S. 143 × 25.4 mm 0.30 kg
75, 100 MPa
4580-1 200 mbar² 1.5 × rated pressure 0.025% F.S.5 ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.01% F.S./°C n/a 110 × 63.5 mm 1.18 kg
(Barometer)
4580-2 35 kPa 1.5 × rated pressure 0.025% F.S.5 ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.01% F.S./°C n/a 165 × 38 mm 0.86 kg
4580-2V 17, 35 kPa 1.5 × rated pressure 0.025% F.S.5 ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.01% F.S./°C n/a 165 × 38 mm 0.86 kg
4580-3V 7 kPa 1.5 × rated pressure 0.025% F.S.5 ±0.1% F.S. < 0.5% F.S. (±0.1% F.S. optional) −20 °C to +80 °C < 0.01% F.S./°C n/a 165 × 63.5 mm 1.72 kg
Note: PSI = kPa × 0.14503, or MPa × 145.03. Piezometers with a range of 350 kPa and higher are capable 3 All high pressure sensors are potentially dangerous and care must be taken not to over-range them beyond their
of reading negative pressures to −100 kPa. Contact GEOKON for more information. calibrated range. Sensors are tested to 150% of the range to provide a factor of safety.
1 Accuracy established under laboratory conditions. 4 For 70 and 170 kPa range only.
2 Other ranges available on request. 5 Depends on readout system.

model 4500s/sv/sh standard piezometers model 4500al/alv standard piezometers

The Model 4500S/SV Standard The Model 4500SH is designed with The Model 4500AL is designed for barometric pressure changes, via a
Piezometer is designed to measure a heavy duty housing. The vented low-pressure ranges. The vented cable with an integral vent tube.
fluid pressures such as ground water version (Model 4500SV) provides version (Model 4500ALV) provides
elevations and pore pressures when automatic compensation for automatic compensation for
buried directly in embankments, fills, barometric pressure changes, via a
etc. It is also suitable for installation cable with an integral vent tube. 4500ALV
inside boreholes, observation wells
and standard ( >19 mm diameter)
piezometer riser pipe.
4500SV

4500AL

4500S

4500SH

www.geokon.com/4500-Series
model 4500b/bv/c small diameter piezometers model 4500dp drive point piezometers

These piezometers are designed to The 4500B and 4500BV are designed The standard Model 4500DP Drive use in soft clays and landfills. The
enable the automation of small to fit inside 19 mm pipe and the Point Piezometer has the transducer piezometer may be recovered at the
diameter piezometer standpipes. 4500C fits inside a 12 mm pipe. located inside a housing with an EW end of the job. The Model 4500DP is
drill rod thread and removable pointed available with a variety of thread
nose cone. The unit can be pushed configurations allowing for
directly into soft ground with the installation using cone penetrometer
signal cable located inside the drill or other drill rods with adapters.
rod. This model is ideally suited for

4500B
4500BV

4500DP 4500DPCT

4500C

model 4500hd heavy duty piezometer model 4500h/hh pressure transducers

The Model 4500HD Heavy Duty with heavily armored cable to The Model 4500H and 4500HH the transducer to be coupled directly
Piezometer is designed for direct withstand earth movements during Pressure Transducers are supplied into hydraulic or pneumatic pressure
burial in fills and dam embankments. construction. Recommended for with ¼-18 female NPT (4500H) and lines. Other pipe thread sizes are
The 4500HD is used in conjunction use in earth dams. 7⁄16-20 60 degree female medium also available.
pressure (4500HH) fittings to permit

4500H 4500HH
4500HD

model 4580-1 barometer model 4580-2/2v/3v pressure transducers

The Model 4580-1 is a barometer used referenced to an absolute barometric The Model 4580 Pressure Transducers water levels in streams, weirs, flumes,
to measure atmospheric pressure reading in millibars. Model are designed for very low fluid etc. Changes in water levels of as little
changes. The barometric sensors 4580-1-ENCL is a protective fiberglass pressure measurements, such as as 0.2 mm can be measured
are calibrated at the factory and enclosure with integral vent. groundwater elevations in wells,

4580-2

4580-2V

4580-1 4580-1-ENCL 4580-3V

 ordering information
cables 4500-1-1: Replacement high air splice kits connectors
02-250V6-E/M: Blue PVC Cable, entry filter stone assembly for 4500S 4500-9-HD: Splice kit for armored 4500-20: 10-Pin Male Connector
6 mm (0.250") Ø, 2 twisted pairs. piezometers, 1 bar. cable, factory splice only. with Cap.
03-250V0-E/M: Black Vinyl Cable, 4500-1-2: Replacement high air 4500-9-HDF1: Splice kit for armored 4500-20V: 10-Pin Male Pigtail with
6 mm (0.250") Ø, 3 twisted pairs. entry filter stone assembly for 4500S cable, field use. tinned leads.
02-250PILT-E/M: Violet Polyurethane piezometers, 2 bar. 4500-9-HDF2: Splice kit for armored 4500-21: 10-Pin Female Connector
Cable, 6 mm (0.25") Ø, 2 twisted pairs, 4500-1-5: Replacement high air to unarmored cable, field use. with Cap
low temperature (-40 to +80 °C), entry filter stone assembly for 4500S 4500-9EP: Epoxy Resin and 4500-21V: 10-Pin Female Pigtail with
50 ohm piezometers, 5 bar. Hardener (138cc). tinned leads.
02-313PI-E/M: Black Polyurethane 4500-2-1: Replacement high air entry 4500-9-SSI: Splice kit for settlement
accessories
Cable, with integral straining wire, 2 filter stone assembly for 4500AL systems, for vented electrical cable 4500-6: Canvas bag.
twisted pairs. piezometers, 1 bar. and fluid filled tubes. 4500-7: Moisture trap with desiccant
02-313V6-E/M: Blue PVC Cable, 4500-2-2: Replacement high air entry 4500-10: Splice Kit for 6 mm (0.250")
capsules (2) for 3 mm (⅛")
8 mm (0.313") Ø, 2 twisted pairs filter stone assembly for 4500AL cable, complete with butt splices polyethylene tube vent line.
with Kevlar reinforcement. piezometers, 2 bar. and epoxy. 4500-8: Desiccant capsule for
02-335VT8-E/M: Yellow Polyurethane 4500-2-5: Replacement high air entry 4500-11: Splice Kit for 9 mm (0.335")
moisture traps.
Cable, with integral 3 mm (0.125") Ø filter stone assembly for 4500AL vented cable, complete with butt 4500-40-1: Magnetic Shield for 19 mm
polyethylene vent tube, 9 mm piezometers, 5 bar. splices, tube union and epoxy. (3/4") Ø sensor.
(0.335") Ø, 2 twisted pairs. 4500-2-6: Replacement high air entry 4500-12: Splice Kit for 10 mm (0.375")
4500-40-2: Magnetic Shield for 25 mm
02-500PE1A-E/M: Black Polyethylene filter stone assembly for 4500HD cable, complete with butt splices (1") Ø sensor.
Cable, with served armor, 13 mm piezometers, 1 bar. and epoxy. 4500-40-3: Magnetic Shield for 38 mm
(0.500") Ø, 2 twisted pairs, overall 4500-2-7: Replacement high air entry 4500-13: Splice Kit for 13 mm (0.500)" (1.5") Ø sensor.
braided shield. filter stone assembly for 4500HD cable, complete with butt splices 4580-1-ENCL: Standard enclosure for
filter stones piezometers, 2 bar. and epoxy. Barometer. Includes mounting plate,
4500-2-8: Replacement high air entry 4500-14: Splice Kit for 16 mm (0.625")
4500-1A: Replacement stainless clamp, and breather vent.
steel filter stone assembly for filter stone assembly for 4500HD cable, complete with butt splices CON-A350: Kellems Grip for 6–8 mm
Model 4500AL Piezometer. piezometers, 5 bar. and epoxy. (0.22–0.32") Ø Cable.
4500-3: Replacement stainless steel 4500-15: Splice Kit for 5 mm (0.187")
4500-1B: Replacement stainless CON-A351: Kellems Grip for 7–9 mm
steel filter stone assembly for mesh type filter, mesh only, for cable, complete with butt splices (0.29–0.37") Ø Cable.
Model 4500B Piezometer. 4500S/4500B piezometers. and epoxy.
4500-5: Factory sealed piezometer cap 4500-16: Splice Kit for 8 mm (0.312")
4500-1C: Replacement stainless
steel filter stone assembly for for shipping saturated piezometers cable (not SR), complete with butt
Model 4500HD Piezometer. with HAE filters, S size. splices and epoxy.
4500-1S: Replacement stainless 4500-5A: Factory sealed

steel filter stone assembly for piezometer cap for shipping saturated
Model 4500S Piezometer. piezometers with HAE filters, AL size.
4500-5B: Factory sealed
4500-1SH: Replacement stainless
steel filter stone assembly for Model piezometer cap for shipping saturated
4500SH Piezometer. piezometers with HAE filters, HD size.

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Lebanon, NH 03766 • USA p: + 1 · 603 · 448 · 1562 registered company GEOKON for details.

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