Depth – Submersible Pressure
Submersible Pressure Sensor
The PS-1000 submersible pressure sensor accurately measures water depth levels. The robust 47Ø acetal body can withstand harsh environments making it ideal for continuous long-term deployments.
Greenspan’s PS-1000 pressure sensors utilise capacitive ceramic pressure-sensitive diaphragms for depth measurement. The changes in depth will vary the pressures acting on the diaphragm and capacitive element. This in turn causes variation in the electronic circuits recording the water depth.
PS-1000 depth sensors are ideal for monitoring groundwater, streams/rivers, and lakes/reservoirs. Their accuracy and reliability make them well suited to studying hydrological run-off, stratification, and industrial processes.
Also available is the PS-7000 stainless steel submergible pressure sensor. The PS-7000 offers the same superb performance as the PS-1000 but in a smaller diameter stainless steel body.
Serial or Analogue Ouput?
The PS-1000 series can have either an analogue output (PS-1000A) or an integrated logger with serial output (PS-1000L).
PS-1000 & PS-7000– Analogue sensors have a 4-20mA output (V output is possible upon request).
PS-1000L logging sensors have either RS-232, RS-485, or SDI-12 when the SDI-12 adaptor is connected.
*Optional internal battery pack is available for logging sensor.
Absolute or Gauge?
Greenspan submersible pressure sensors are available in either absolute pressure or gauge pressure. Gauge Sensors are vented to the atmosphere so that the effects of changes in barometric or atmospheric pressure do not affect water level readings. Sensors that are not vented to the atmosphere are referred to as Absolute Sensors. The main difference between gauge and absolute pressure sensors is the effect of atmospheric pressure on the water level measurements they provide.
Australian Made
Greenspan has made our range of water quality sensors in Australia for over two decades. Our experience has allowed us to design sensors that reliably deliver accurate data in the harshest environments Australia has to offer.
With every Greenspan water quality sensor, you receive; local support from our experienced sales and service technicians, local repairs and recalibration from our Melbourne-based engineers, and access to local spares from our factory in Melbourne. No other brand of water quality sensor can offer such exceptional service.
LOCAL
REPAIR
LOCAL
SUPPORT
LOCAL
SPARES
PS-7000 – Stainless Steel Pressure Sensor
On rare occasions, a PS-1000’s acetal body is not suitable. In such conditions, we can provide the PS-7000.
The PS-7000 is a stainless steel submersible pressure sensor while still offering the same superb accuracy as the PS-1000 series.
PS-1000/PS-7000 Specifications
| SPECIFICATION | VALUE |
|---|---|
| Measurement Technique | ½” ceramic capacitance transducer |
| Standard ranges available. | 2.5, 5, 10, 20, 40, 75, 100 m Absolute Ranges: 20, 40, 75, 100 m. For non-standard please contact Greenspan. |
| Overall accuracy (combined linearity, hysteresis and repeatability) | +/–0.1%full scale |
| Sensor outputs | 4-20mA, RS-232, RS485 Modbus, SDI-12 (adaptor required) |
| Long term stability | 0.2% full scale per annum |
| Zero offset and full-scale maximum variation | n +/–0.02 mA |
| Cable type | Polyurethane sheathed cable, OD 8 mm, with 3m vent tube, Aramid reinforced, moulded entry, bare wire connection |
| Standard cable lengths | 10, 30 50, 80, 100, 150 200 m |
| Non-standard cable lengths | Yes (Extra cable moulding time may be required) |
| Closed Vent System (CVS) | Gauge sensors must be fitted with a CVS |
| Power supply | 8 to 30 V DC (at sensor) loop powered |
| Reverse polarity protection | Yes |
| Surge current protected | To 2 kV |
| Warm-up time to stable reading | <150 ms |
| Current consumption | Up to 20 mA while turned on, 0mA when off |
| Operating temperature | 0–50°C |
| Storage temperature | –5°C – +60°C |
| Max over pressure | At least twice the full scale range |
| Dimensions (L×OD) | PS-1000: 328 mm × 47 mm Ø (12.91” × 1.85”Ø) PS-7000: 278 mm× 22 mm Ø (11″× 0.86″Ø) |
| Weight | PS-1000: 550g plus cable weight (665 g per 10 m length) PS-7000: 300g plus cable weight (665 g per 10 m length) |
| Wetted materials | PS-1000: Acetal, ceramic, 316 passivated stainless steel, polyurethane, viton. PS-7000: Ceramic, 316 passivated stainless steel, polyurethane, viton |
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