New submersible level transmitter offers high accuracy and stability
The SDI-12L range of submersible level transmitters from Impress Sensors & Systems Ltd uses either a stainless steel silicon-based pressure sensor or a ceramic pressure sensor in marine-bronze. Both versions use piezoresistive technology, which provides long-term stability and repeatability of measurements.
The transmitter is suitable for a wide range of applications, including the monitoring of river and reservoir levels; tanks and vessels in process plants; borehole water levels; environmental monitoring; and V-notch weir flow measurement.
The stainless steel version offers a higher resolution of pressure measurement to around 12-13 bit and has a much lower signal-to-noise ratio, providing a smooth and accurate method of level measurement. The ceramic pressure sensor version is better suited to marine use, where standard devices may suffer from corrosion.
The SDI-12L offers measurement ranges from 0.5mWG up to 200mWG. The output units can be adjusted to mmWG, cmWG, inHg and all the standard engineering units required via the SDI-12 interface and command structure. Temperature range of the transmitter is from –20oC up to +60oC. Accuracy of the inbuilt temperature sensor is less than ±0.1% of full-scale output. The transmitter can be corrected according to the specific density of the media being measured and local gravity can be set within the device, adding further to the accuracy of the unit.
Impress Sensors & Systems Ltd, Unit 6B, Mercury House, Calleva Park, Aldermaston, Berks RG7 8PN; tel: +44 (0) 118 981 7980; fax: +44 (0) 118 981 7990; email: info@impress-sensors.co.uk
The transmitter is suitable for a wide range of applications, including the monitoring of river and reservoir levels; tanks and vessels in process plants; borehole water levels; environmental monitoring; and V-notch weir flow measurement.
The stainless steel version offers a higher resolution of pressure measurement to around 12-13 bit and has a much lower signal-to-noise ratio, providing a smooth and accurate method of level measurement. The ceramic pressure sensor version is better suited to marine use, where standard devices may suffer from corrosion.
The SDI-12L offers measurement ranges from 0.5mWG up to 200mWG. The output units can be adjusted to mmWG, cmWG, inHg and all the standard engineering units required via the SDI-12 interface and command structure. Temperature range of the transmitter is from –20oC up to +60oC. Accuracy of the inbuilt temperature sensor is less than ±0.1% of full-scale output. The transmitter can be corrected according to the specific density of the media being measured and local gravity can be set within the device, adding further to the accuracy of the unit.
Impress Sensors & Systems Ltd, Unit 6B, Mercury House, Calleva Park, Aldermaston, Berks RG7 8PN; tel: +44 (0) 118 981 7980; fax: +44 (0) 118 981 7990; email: info@impress-sensors.co.uk
