Model 4500H/4500HH
Pressure Transducer
The Model 4500H/4500HH Pressure Transducer is 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 | ||
| Standard Ranges | (H) |
350,
700 kPa; 1.0, 2.0, 3.0 MPa 5.0, 7.5, 10, 25, 50, 75, 100 MPa |
| Over Range | 2 x rated pressure | |
| Sensitivity | 0.025% F.S. (minimum) | |
| Accuracy | ±0.1% F.S. | |
| Linearity | < 0.5% F.S. (±0.1% F.S. optional) | |
| Temperature Range¹ | –20°C to +80°C | |
| Length x Diameter | (H) (HH) |
140 x 25.4 mm 143 x 25.4 mm |
| ¹High temperature versions available on request. |
||
Model 4580
Pressure Transducer
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 x rated pressure |
| Sensitivity² | 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 x Diameter | 110 x 63.5 mm (barometer); 165 x 38, 165 x 63.5 mm |
| ¹Other ranges available on request ² Depends on readout system |
|
Model 4675LV
Weir Monitor
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 | 300, 600, 1500 mm |
| Sensitivity | 0.02% 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 x Diameter | (transducer) 165 x 25 mm |
| ¹Other
ranges available on request ²Using antifreeze solution can extend the range below 0°C |
|
*All Davisson 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).
