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Valeport - Model 802 -Two Axis Electromagnetic Current Flow Sensors
The Model 802 is the very latest in Valeport`s electromagnetic flow sensing technology, developed over many years from the original IOS design. State of the art electronics design ensures low power operation, yet maintaining low noise and high stability. A range of sensor heads and electronics packages mean that the Model 802 can be used in a wide variety of real time applications, or can easily be interfaced to customers` existing systems to provide a reliable, accurate current meter.
Sensors
- The Model 802 is available with a choice of different sensor shapes to suit a variety of applications. The specific characteristics of each type are as follows:
Discus
Particularly suitable for laminar flow applications. The smallest sensors give excellent spatial resolution, and the largest are particularly robust. Sampling volume is a cylinder of the same diameter as the sensor, and height of ½Ø, projecting from the sensor face.
- Size: 3.2, 5.5 or 11cm Ø
- Accuracy:
- ±1% measurement accuracy
- ±5mm/s zero stability
- ±12mm/s (rms) signal noise @ 1m/s (3.2cm)
- ±10mm/s (rms) signal noise @ 1m/s (5.5cm)
- ±2mm/s (rms) signal noise @1m/s (11cm)
- Tilt Response: -5% @ 25°
- Heading Error: ±0.5° max
Spherical
Suitable for non-laminar flow applications, where durability is of prime concern. Sampling volume is a sphere surrounding the sensor, 3 x Ø of sensor.
- Size: 3.2, 5.5cm Ø
- Accuracy:
- ±1% measurement accuracy
- ±5mm/s zero stability
- ±20mm/s (rms) signal noise @ 1m/s (3.2cm)
- ±15mm/s (rms) signal noise @ 1m/s (5.5cm)
- Tilt Response: -5% @ 90°
- Heading Error: ±5° max
Data Acquisition
- Sample Rate: 1, 2, 4, 8 or 16Hz, or data on demand
- Control: Via ASCII control codes
- Filter Delay: Digital FIR filter, with delay dependent on rate
- 1Hz 8 samples
- 2Hz 8 samples
- 4Hz 7 samples
- 8Hz 15 samples
- 16Hz 5 samples
Data Output
- RS232: ±XXXX<tab>±YYYY<cr><lf> where XXXX and YYYY are speeds on X & Y axes in mm/s.
- Analogue: Optional ±5V each axis (reconstituted from digital data using 12 bit D/A).
- Enquire about alternative ranges.
Configurations
Integral Underwater
Chosen sensor and all electronics in a single underwater housing, with a single connector for power in / signal out.
Remote Underwater
Chosen sensor and pre-amp housing on a 3m cable to separate electronics housing. Single connector for power in / signal out.
OEM Package
Chosen sensor and pre-amp housing on a 3m cable to un-housed electronics. Supplied with wiring looms for power in and signal out.
Display Unit Package
Chosen sensor and pre-amp housing on a 3m cable to surface control display unit fitted with graphics LCD display showing instant and average data. Display unit also has internal battery pack supplying itself and sensor, and 128kbyte memory (data downloaded to PC in ASCII text format). Display unit specifications are:
- Material: Moulded ABS plastic
- Power: 8 x 1.5v alkaline C cells
- Dimensions: 244 x 163 x 94mm, 2kg
- Protection: IP67 (10 secs @ 0.3m)
Physical
- Materials: Polyurethane sensors, Titanium housings.
- Depth Rating: All sensors and housings rated to 3000m
- Connectors: Valeport subsea connectors
- Power: 12 - 24vDC, add 1.5W for display unit system
