The constantly growing penetration of automation and computerized data processing into water usage, in agriculture, industry, urbanic water supply systems and any other field where more is required than just the traditional mechanical register of water meters, creates a high demand for measuring instruments which are able to provide electrical information about the flow. Arad Water Meters equipped with electrical output devices combine the high reliability of the hermetically sealed, magnetically driven register with a wide variety of electric output options. All existing Arad Water Meters with magnetic registers can be easily upgraded to include electrical output.

Application Examples

1. Remote Reading
In combination with a remote reading system, or computerized data acquisition system, it is possible to collect and process water usage data in multi-apartment houses, in places with no access, or wherever it is required to bring all data to one point.

2. Flowrate Measuring
With the appropriate type of electrical output it is possible to obtain on-line information about the flowrate which can be displayed, stored or both.

3. Flowrate Control
With the appropriate type of electrical output and additional electronic control device it is possible to perform various functions like the operation of valves, pumps or alarm signals according to various preset levels of flowrate.

4. Bi-directional Flow Measurement
With the appropriate electrical output and an additional electronic module it is possible to distinguish between flow directions, to measure and record flow rates and volumes passed in each direction.

5. Batching
Feeding electrical output to a batching controller enables pre-setting and delivering of accurate volumes of water in irrigation systems, industrial process etc.

Electrical Output Types

Two types of outputs exist for various functions as follows:

1. “VOLUME” output - for functions related only to the measured volume. Transducer: Reed Switch. Designation: EV
2. “FLOWRATE” output - for functions related to the rate of change in the flowing volumes. Transducer: Photo Diode Designation: EF
3. "VOLUME" output of 1/10 of first pointer volume.

Transducer: Photo Diode
Designation: EF-P

The new Woltman Silver Turbo - WST is the latest state of the art meter developed by ARAD's R&D department. Advanced methods and technologies were implemented in order to present a product much superior to those found in the market today.

Features:

In addition to the features offered by Arad's traditional Woltman Turbine meter, the Woltman Silver Turbo (WST) offers the following:

• Accuracy - The WST's accuracy curve is the widest known in the market: The minimum flow rate is 35%-58% below the ISO standard for such meters and the maximum flow rate is 150%-233% above it. The combination of these unique features allows the use of the WST in broader applications and in extreme situations.
• Ratios - The ratio between the extreme flow rates (Q min and Q max) is:
  - 1:330 in the 2" WST
  - 1:400 in the 3" WST
  - 1:375 in the 4" WST
  - 1:169 in the 6" WST
  - 1:146 in the 8" WST
• Resistance - Bearings and materials used in the WST have been proved to ensure durability far beyond the ISO Standard requirement. This feature ensures that the meter can function in extreme conditions where other meters fail to maintain a Sufficient level of accuracy.
• Magnetic Coupling - The WST, like its predecessor, the Woltman Turbo meter - has a unique measuring unit, in which only one moving element, the impeller, is in contact with the water. . The other moving components, including the worm & transmission gear, are kept sealed inside a dry compartment and have no contact with any of the abrasive elements present in the water.
• WST has repelling magnets installed in the impeller and the transmitting gear, instead of the attracting magnets installed in the WT
• Compatibility with EV, EF, , Dialog 2G, Dialog 3G, etc. The WST's measuring unit can be installed in any of the existing Arad WT models.

Applications: Water supply networks, agricultural applications and industrial use.
Available Sizes: 200mm
Standards: ISO 4064, AWWA, EEC

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