SDI-12 Level Sensor

	SDI-12 Submersible Level Sensor Key Features Level Ranges from 1.5 to 70mWG Unsurpassed Accuracy of ±0.05% Total Error Band SDI-12 Communication Interface Welded 316 SS or Titanium Construction On-board Surge Protection Optional Lifetime Lightning Protection Custom Cable Lengths LCD bar graph display Compact ... Portable ... Battery-powered The Series 500 submersible hydrostatic level transducer represents the leading edge of level sensing technology available today. Incorporating a highly stable media-isolated sensor, the Series 500 features SDI-12 serial-digital interface. SDI-12 is a standard for interfacing data recorders with microprocessor-based sensors, especially in the environmental monitoring field. The transducer meets the demanding requirements of the USGS Office of Surface Water (OSW) accuracy specification for stage monitoring. The Series 500 is intended for applications with requirements that include battery-powered operation with minimal current drain, low system cost, and use of a single recorder with multiple sensors “daisy-chained” on one cable. It will accommodate cable lengths between sensors and recorder up to 200 feet. Able to operate from unregulated 12VDC power, each unit contains a microprocessor and EEPROM, which in addition to supporting the SDI-12 interface, are used to implement sophisticated compensation algorithms. This technique, combined with superior media-isolated sensing technology and proven packaging, results in a price/performance combination unmatched by any previous technique. The attached electrical cable is custom manufactured and includes Kevlar® members to prevent errors due to cable elongation, and a unique water block feature that self-seals in the event of accidental cuts to the cable. Each transducer is shipped with our latest SuperDry™ Vent Filter that prevents moisture from entering the vent tube for at least one year without maintenance, even in the most humid environments. The Series 500 is CE compliant to EN 61000-6-4:2001 and EN 61000-6-2:2001 and have an IP 68 and NEMA 6P housing protection rating. Uniquely Designed Submersible Cable This level transducer utilises one of two types of custom cable made specifically for submersible applications. The cable of choice for most applications is a polyurethane-jacketed cable incorporating Kevlar® strength members to prevent errors due to cable elongation, and a water block liner to prevent water intrusion due to minor cuts to the cable jacket. Polyurethane cable is attached to the transducer using an injection moulded polyurethane cable seal. The other alternative is a Tefzel®-jacketed cable which provides superior chemical resistance and toughness, yet preserves the other features found in the polyurethane-jacketed cable. Tefzel® is a Teflon® derivative from DuPont and is the better choice for caustic media or when a high degree of abrasion is anticipated. While more expensive and less flexible, it can save money in the long term due to reduced maintenance costs. Tefzel® cable is attached to the transducer using a compressed Viton® gland cable seal. In all installations, care should be taken to ensure no damage occurs to the cable, as cable damage represents one of the most frequent causes of transducer failure. Applications; Level Monitoring Well Monitoring Ground Water Monitoring Dewatering Down Hole Surface Water Monitoring Reservoirs Oceanographic Research Tank Level

Key Features

Level Ranges from 1.5 to 70mWG
Unsurpassed Accuracy of ±0.05% Total Error Band
SDI-12 Communication Interface
Welded 316 SS or Titanium Construction
On-board Surge Protection
Optional Lifetime Lightning Protection
Custom Cable Lengths
LCD bar graph display
Compact ... Portable ... Battery-powered

The Series 500 submersible hydrostatic level transducer represents the leading edge of level sensing technology available today. Incorporating a highly stable media-isolated sensor, the Series 500 features SDI-12 serial-digital interface. SDI-12 is a standard for interfacing data recorders with microprocessor-based sensors, especially in the environmental monitoring field. The transducer meets the demanding requirements of the USGS Office of Surface Water (OSW) accuracy specification for stage monitoring. The Series 500 is intended for applications with requirements that include battery-powered operation with minimal current drain, low system cost, and use of a single recorder with multiple sensors “daisy-chained” on one cable. It will accommodate cable lengths between sensors and recorder up to 200 feet.

Able to operate from unregulated 12VDC power, each unit contains a microprocessor and EEPROM, which in addition to supporting the SDI-12 interface, are used to implement sophisticated compensation algorithms. This technique, combined with superior media-isolated sensing technology and proven packaging, results in a price/performance combination unmatched by any previous technique. The attached electrical cable is custom manufactured and includes Kevlar® members to prevent errors due to cable elongation, and a unique water block feature that self-seals in the event of accidental cuts to the cable. Each transducer is shipped with our latest SuperDry™ Vent Filter that prevents moisture from entering the vent tube for at least one year without maintenance, even in the most humid environments.

The Series 500 is CE compliant to EN 61000-6-4:2001 and EN 61000-6-2:2001 and have an IP 68 and NEMA 6P housing protection rating.

Uniquely Designed Submersible Cable
This level transducer utilises one of two types of custom cable made specifically for submersible applications. The cable of choice for most applications is a polyurethane-jacketed cable incorporating Kevlar® strength members to prevent errors due to cable elongation, and a water block liner to prevent water intrusion due to minor cuts to the cable jacket. Polyurethane cable is attached to the transducer using an injection moulded
polyurethane cable seal.
The other alternative is a Tefzel®-jacketed cable which provides superior chemical resistance and toughness, yet preserves the other features found in the polyurethane-jacketed cable. Tefzel® is a Teflon® derivative from DuPont and is the better choice for caustic media or when a high degree of abrasion is anticipated. While more expensive and less flexible, it can save money in the long term due to reduced maintenance costs. Tefzel® cable is attached to the transducer using a compressed Viton® gland cable seal.
In all installations, care should be taken to ensure no damage occurs to the cable, as cable damage represents one of the most frequent causes of transducer failure.

Applications;

Level Monitoring
Well Monitoring
Ground Water Monitoring
Dewatering
Down Hole
Surface Water Monitoring
Reservoirs
Oceanographic Research
Tank Level

SDI-12 Submersible Level Sensor