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ULTRA Series Digital Smart Toroidal Conductivity Sensor

The ULTRA Series Digital Smart Toroidal Inductive Conductivity Sensor from Turtle Tough is designed for wide-range, high-conductivity measurement in chemically aggressive processes. A polypropylene sensor tip and Kynar body provide outstanding chemical resistance.

Integral RS-485 Modbus RTU communications allow a simple, fully portable installation. The sensor can be calibrated in the lab, shop or field, and temperature and cell constant calibrations can be done in service to match grab-sample reference values.

FAQ

What is a toroidal conductivity sensor?

A toroidal (inductive or electrodeless) conductivity sensor uses two encapsulated coils instead of exposed electrodes. One coil induces a current in the liquid passing through the sensor bore, and the second coil measures it. The induced current is proportional to the conductivity of the solution.

When should I choose a toroidal sensor over a contacting sensor?

Because no metal electrodes touch the process, toroidal sensors resist fouling, coating and corrosion, making them well suited to high-conductivity, dirty or chemically aggressive solutions such as acids, caustics and brines. Contacting sensors are the better choice for low-conductivity and pure water, where toroidal sensors lack sensitivity.

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What are the advantages of the ULTRA toroidal conductivity sensor?

  • Polypropylene (PP) sensor tip and Kynar body for outstanding chemical resistance
  • Two user-selectable operating modes cover a very wide conductivity range
  • Automatic temperature compensation with an integral Pt1000 element
  • Computed salinity (PSU) and selectable TDS units (NaCl, 442 or KCl)
  • Compatible with Turtle Tough TOUCH Series controllers, the DSS1 Series analyser and any Modbus RTU (RS-485) device

Specifications

  • Standard range mode: 3,900 to 390,000 µS/cm (at 25 °C)
  • High range mode: 23,400 to 2,340,000 µS/cm (at 25 °C)
  • Resolution: 7.8 µS/cm (standard) / 46.8 µS/cm (high)
  • Temperature compensation: user adjustable 0.01 to 9.99 % per °C (2.00 % per °C default)
  • Operating temperature: −20 to +120 °C (−4 to +248 °F) inline/immersion; −20 to +85 °C (−4 to +185 °F) fully submersible
  • Pressure: max 100 psig at 65 °C (inline installations)
  • Process connections: 1″ MNPT rear threads for immersion and submersible; 2″ MNPT front threads adapted to a process pipe tee for inline
  • Calibration: zero dry-in-air offset; separate slope for standard and high range modes
  • Output: DSS1 – Modbus RTU (RS-485)
  • Cable: 6 m (20 ft) standard; 4-pin NEMA 6P quick-connect plug

What installation options are available?

Immersion, fully submersible on an immersion rod, and inline using a sensor holder or hot-tap assembly. Inline use must be specified at the time of order.