Rittmeyer Pressure and Level Transducer

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SDI-12 Depth Sensor

Short Description

The pressure transducers of the series MPSDI are designed to measure pressure and water level with high accuracy (better 0.01ft.). The transducers are available either as submersible unit connected to a vented cable for error-free compensation of barometric pressure changes or as thread mount type used e.g. in connection with a bubbler system. The incorporated electronics compensates nonlinearity and also temperature variations in a wide range resulting in an increased overall accuracy.

The SDI-12 compatible serial-digital interface enables output of pressure, level and temperature values as well as the user-specific programming of the sensors in a multidrop bus confuguration. Via the SDI-12-interface, MPSDI pressure sensors can be connected to computers, data loggers etc. by means of a shielded three wire cable Recalibration, free adjustement of offset and measuring-span (scaling) and choice of output-parameters are possible. Low power circuitiy combined with a sleep-mode keeps power consumption down to an absolute minimum.

Advantages

SDI-12 serial-digital output
Microprocessor-controlled transducer
High accuracy (0.05 %)
Low power consumption
Temperature compensated
Environmentally rugged
High reliability and stability

Applications

For water well measurements
Level sensors for small-bore applications
Measurement of gas pressures
Pressure / level measurement instorage and run-of-river power stations, water supply plants, sewage treatment plants
Level mesurements in hydrology (navigation locks, weirs, irrigation plants etc.)

Technical Characteristics

submersible

Measuring ranges	0 ... 0.1 bar to 0 ... 50 bar (0 ... 145 psi up to 0 ... 725 psi)
Overpressure	3 to 6 times (depending on the range)
Accuracy	< 0.05% of full scale or 3 mm (0.01 ft) for ranges < 5 m (15 ft)
Temperature influence	typ. < 30 ppm/ºC of full scale max. < 50 ppm/ºC of full scale
Operating temperature	-20ºC ... +70ºC (-4ºF ... 158ºF) -38ºC ... +70ºC (-36.4ºF ... 158ºF) optional
Communication	Bidirectional serial bus, multidrop communication, up to 10 sensors, SDI-12 protocol
Overvoltage protection	Built-in protector up to 2000 V (transient)
Control and Programming	Recalibration, free adjustement and choice of output-parameters via data logger or a personal computer (in connection with a SDI-12 to RS232 converter)

Price: 960.00
Includes 20 ft Vented Cable

Advanced Measurements & Controls, Inc.