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

70, 170, 350, 700 kPa;

1, 2, 3 MPa

5, 7.5, 10, 20, 35, 75,

100 MPa
Over Range 2 × rated pressure 2 × 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.

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 4675LV.

Weir Monitor

Model 4675LV

The Model 4675LV water level monitoring system 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. The frequency is measured either by the GK-403 portable readout, the MICRO-10 Datalogger or the Model 8001 Single Channel Datalogger.

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).

Please Note: Geokon maintains an ongoing policy of design review and reserves the right to amend products and specifications without notice.