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    LTC Meter Applications

    LTC Meter Conductivity, Temperature Level and Depth Measurements

    Measurement and Display Options

LTC Meter Applications

Ideal for profiling conductivity and temperature, the LTC Meter has a fast response, a rugged design and is easy to use.

The Model 107 LTC Meter is perfect for profiling conductivity and temperature in wells and open water, for salt-water intrusion studies, as well as a general indication of contamination levels. The 3/4" (19 mm) diameter probe is attached to PVDF flat tape; accurately laser marked every 1/100 ft or each millimeter. GroundwaterSoftware.com offers tape lengths up to 1000 ft or 300 m and are mounted on a reel.

The conductivity range is from 0-80,000 µS/cm. Conductivity and temperature measurements are displayed on a rotating LCD screen on the face of the reel. Conductivity accuracy is 5% of reading or 100 μS (which ever is greater). A light and buzzer are briefly activated when the zero point of the probe enters water. The depth to water and depth of displayed readings are read off the tape. The 9V alkaline battery is housed in an easy-access battery drawer and provides up to 90 hours of use.

Conductivity measurements are read from 0-80,000 µS/cm with readings giving accuracy of 5% of reading or 100 µS (which ever is greater). Water level and probe depth measurements are read off the durable PVDF flat tape, which is accurately laser marked every 1/100 ft or each millimeter. Tape lengths are now available up to 1000 ft (300 m). For automated water level, temperature, and conductivity datalogging, GroundwaterSoftware.com also offers the LTC Levelogger Junior.

• Tape lengths to 1000 ft (300 m)
• Rugged reel and accurate PVDF laser marked tape
• Probe diameter 3/4" (19 mm)
• Display that rotates for easy reading
• Standard 9V alkaline battery gives 90 hrs. of use
• Auto-Off after 8 minutes

The high quality PVDF flat tape offered by GroundwaterSoftware.com reels smoothly, remains flexible and hangs straight in the well, irrespective of temperature. The flat tape is mounted on a sturdy, well-balanced reel, with a convenient battery drawer for the 9 Volt alkaline battery. Permanent laser markings each 1/100 ft or millimeter allow accurate readings. Standard stainless steel conductors and copper coated stainless steel conductors resist corrosion, provide strength and are non-stretch. They make the tape easy to repair and splice. The dog-bone design reduces adherence to wet surfaces.

Each 1/100 ft, 1/10 ft and ft

Each mm, cm and m

100 ft, 200 ft, 300 ft, 500 ft, 750 ft, 1000 ft (30 m, 60 m, 100 m, 150 m, 250 m, 300 m)

The LTC Meter offered by GroundwaterSoftware.com uses a ‘smart’ conductivity sensor with platinum electrodes to measure conductivity. The conductivity is displayed on the rotating screen along with the associated temperaturemeasurement. The ‘smart probe’ displays conductivity that has been standardized to 25°C, i.e. Specific Conductance (displayed as EC). The conductance temperature coefficient is 2.0% per °C. Calibration is simple, using 1413 ìS, 5000 ìS, 12,880 ìS, and/or 80,000 ìS solutions for 1, 2, 3, or 4 point manual conductivity calibrations.

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LTC Meter Conductivity, Temperature Level and Depth Measurements

• Profiling conductivity and temperature in wells and open water
• Salinity studies
• Saltwater intrusion investigations
• Testing for water quality impairments from road salt
• Tracer tests
• General indication of chemical contamination level
• Early warning of changes in water quality at Landfills and Industrial Sites

When the zero point of the probe enters water, an electric circuit is completed, briefly activating a buzzer and blanking out the screen for about 1 second. The depth to water is then read off the tape. When the LTC Meter is withdrawn from the water, a short buzz gives a warning that the probe is now out of water.

A Tape Guide/Datum allows the depth measurement to be read at the marked position on the Tape Guide, to give reliable, repeatable, accurate depth measurements when profiling a well. The Tape Guide protects the tape from damage on rough edges of well casing.

The LTC Meter operates in a range from -15°C to +50°C (23°F to 122°F). You may choose to have the readings displayed on the LCD screen in °C or °F. Accuracy is +/- 0.2°C in Celsius, or +/- 0.4°F in Fahrenheit. The 'smart' LTC probe automatically adjusts the measured conductivity values to display as specific conductance. This provides standardized repeatably comparable measurements. When the probe is turned on, the LCD screen displays both conductivity and temperature.

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Measurement and Display Options

The display menu is simple to operate. When the unit is turned on, it will begin to display electrical conductivity and temperature readings, in or out of water. If the ON button is held down for 2 seconds and released, the display moves to the next menu item. Press the ON button two times quickly in any given screen to achieve the displayed action.

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