By Norman Bartlett Creative Sensor Technology 1
Irrigator’s View of Landscape Irrigation “ We are beautifying the world” Public’s View “You are wasting water, our precious and dwindling resource” Creative Sensor Technology2
1. Verify system design efficiency A.Distribution uniformity B.Matched sprinkler precipitation rates C.Sprinkler zone make-up by: A.Plant materials (crop coefficients) B.Slope C.Exposure D.Soil type D.Observe Actual Precipitation Rate Creative Sensor Technology3
2. Create a Water Budget and Balance Supply with Demand LWA ≥ LWR You cannot Balance unless you measure Creative Sensor Technology4
3. Document what you have done A.Keep detailed records of water usage, ET or temperature information, etc. by day, month, season, year B.Defend your water usage with data C.Market your skill as a water manager D.Promote your organization as a good citizen and good steward of the environment. Creative Sensor Technology5
4. Detect Leaks and Prevent Waste Creative Sensor Technology6
Comply with the new Cal. MWELO Creative Sensor Technology7
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Water flowing through the pipe turns the impeller Electronics in the insert count the blades as they go by the detector The output is a digital pulse proportional to the speed of rotation Formula converts the signal into a flow rate using conversion factors (K and Offset, PPG ) Creative Sensor Technology10
Designed to measure a range of water qualities Rate of Flow measuring device Broad range of flow Negligible pressure loss Fast Signal format Creative Sensor Technology11 Flow Sensor
Water Meter Designed to measure domestic (potable) water Totalizer Clean water only Limited range of flows High pressure loss Slow signal format Creative Sensor Technology12
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Comparison with other impeller sensors Creative Sensor Technology23
2. 1” Sensor Construction CST has a 1 inch PVC Sensor in the FSI series DI has only a threaded brass unit. Creative Sensor Technology, Inc.24
3. Sensor Assembly The CST sensor insert is held into the mounting tee with a larger diameter, ACME threaded retaining nut making disassembly and assembly quick and easy, particularly in underground valve boxes. The DI sensor insert is held in the mounting tee with a pin and split ring. The insert must be aligned and inserted to the correct depth in order to push the pin horizontally through the housing. This can be awkward and difficult in the small valve box. Creative Sensor Technology, Inc.25
Creative Sensor Technology, Inc Saddle type sensors ◦ Available in 3 and 4 inch ◦ Easier to install on larger pipe sizes ◦ Complete with saddle ◦ Offers same wide range of flows
5. Electrical Protection The CST sensor electronics have been designed with protection against reverse wiring, overvoltage and over current. 6. Watertight Integrity The CST sensor housing and wiring has been designed to protect the electronics from moisture, improving on the design flaw of the DI sensor. Creative Sensor Technology, Inc.27
Better low flow detection Easier to install/service with jar top Better electronic protection Higher pressure rating Virtually no friction loss Lower cost Creative Sensor Technology, Inc.28
Comparison with combination master valve/meters (Hydrometer Creative Sensor Technology29
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Add flow measurement to: 1. Verify that your installed system meets the design goals of efficiency and functionality 2. Verify water application rates and balance water use with available water supply 3. Document and record water usage and savings 4. Prevent water loss or site damage by continually monitoring flow Creative Sensor Technology41
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