Photo of Model 4500H.

Pressure Transducers

Model 4500H, 4500HH

The Model 4500H and 4500HH Pressure Transducers are supplied with a 1/4 -18 NPT male or female pipe thread fitting to permit the transducer to be coupled directly into hydraulic or pneumatic pressure lines. Other pipe thread sizes are also available.*

Specifications 4500H 4500HH

Standard Ranges

−100 to 70, 170, 350,

700 kPa; 1, 2, 3 MPa

−100 to 5, 7.5, 10, 20,

35, 75, 100 MPa
Over Range 1.5 × rated pressure 1.5 × rated pressure
Resolution 0.025% F.S. (minimum) 0.025% F.S. (minimum)
Accuracy ±0.1% F.S. ±0.1% F.S.
Linearity¹ <0.5% F.S. <0.5% F.S.
Temperature Range² −20°C to +80°C −20°C to +80°C
Length × Diameter

140 × 25.4 mm

140 × 32 mm (70, 170 kPa)

 143 × 25.4 mm

¹±0.1% F.S. option available.

²High temperature versions available on request.

Note: All high pressure sensors are potentially dangerous and care must be taken not to over-range them beyond their calibrated range. Sensors are tested to 150% of the range to provide a factor of safety.

Photo of Model 4580.

Pressure Transducers

Model 4580

The Model 4580 Pressure Transducers are designed for very low fluid pressure measurements, such as groundwater elevations in wells, water levels in streams, weirs, flumes, etc. Changes in water levels of as little as 0.2 mm can be measured. Sealed and evacuated types can be used as a barometer to measure atmospheric pressure changes.*

Specifications
Standard Ranges 200 Mbar¹ (barometer); 7, 17, 35 KPa
Over Range 2 × rated pressure
Resolution² 0.025% F.S.
Accuracy ±0.1% F.S.
Linearity <0.5% F.S. (±0.1% F.S. optional)
Temperature Range −20°C to +80°C
Length × Diameter 110 × 63.5 mm (barometer); 165 × 38, 165 × 63.5 mm

¹Other ranges available on request.

²Depends on readout system.

Photo of Model 4500HT.

High Temperature Pressure Transducers

Model 4500HT Series

Geokon's 4500HT Series High Temperature Pressure Transducers are designed for monitoring downhole pressures and temperatures in oil recovery systems and geothermal applications, where the temperature may be as high as 250°C. These sensors are supplied with either mineral insulated cables or Teflon cables inside stainless steel tubing.

Specifications
Standard Ranges

−100 to 700 kPa;

1, 2, 3, 5, 7.5, 10, 25, 50, 75, 100, 150 MPa
Over Range 2 × rated pressure
Resolution 0.025% F.S. (minimum)
Accuracy ±0.1% F.S.
Linearity <0.5% F.S. (±0.1% F.S. optional)
Temperature Range 0°C to +250°C
Length × Diameter

210 × 19 mm (−100 to 700 kPa; 1, 2, 3, 5, 7.5,

10, 25 MPa)

210 × 25 mm (50, 75, 100, 150 MPa)

Photo of Model 4570 (Level 1000).

Downhole Water Level Dataloggers

Model 4570 Series (Level 1000, Level 2000)

The Level 1000 and Level 2000 are battery powered down-hole water level and temperature recorders. The Level 1000 is a sealed (absolute) all-in-one submersible pressure transducer with built-in datalogger, which is designed to be hung in the well using a stainless steel suspension wire. The Level 2000 is a vented (gage) version, which employs a vented cable to the atmosphere via a moisture trap located at the well head.

Specifications
Temperature Sensor Internal Semiconductor
Temperature Range 0°C to +80°C
Temperature Resolution 0.1°C
Calibrated Accuracy ±0.5°C
Pressure Sensor Semiconductor (strain gage)
Nominal Range (Level 1000) 30 psi; (Level 2000) 15 psi
Level Resolution (Level 1000) 0.05 psi; (Level 2000) 0.02 psi
Calibrated Accuracy ±0.3% F.S. @ 25°C
Length × Diameter

(Level 1000) 145 × 32 mm;

(Level 2000) 232 × 32 mm (transducer/datalogger)

181 × 31 mm (moisture trap)

Photo of Model 4675LV.

Weir Monitor

Model 4675LV

The Model 4675LV is a water level monitoring system that uses a vibrating wire force transducer to provide a highly stable and sensitive means of monitoring water levels. The main component is a cylindrical weight suspended from the force transducer. The cylinder hangs partially submerged in the water whose level is to be monitored. As the water level changes the changing buoyancy force on the cylinder acts directly on the vibrating wire transducer and alters its tension and hence its resonant frequency.

Specifications
Standard Ranges¹ 150, 300, 600, 1500 mm
Resolution 0.025% F.S. (minimum)
Accuracy ±0.1% F.S.
Linearity <0.5% F.S.
Stability ±0.05% F.S. per year
Temperature Range² −20°C to +80°C
Length × Diameter 165 × 25 mm (transducer)

¹Other ranges available on request.

²Using antifreeze solution can extend the range below 0°C.

*Please Note: All Geokon vibrating wire pressure transducers include tripolar plasma surge arrestors to protect the sensor coils from possible lightning damage. Semiconductor pressure transducers are also available (see 3400 Series).

Products

Please Note: Geokon maintains an ongoing policy of design review and reserves the right to amend products and specifications without notice. Various instruments are discontinued over time and replaced with new, updated models.