Hersey Meters offers a complete line of Positive Displacement water meters in 5/8″ through 2″ sizes. The largest measuring chambers in the business allow these water meters to outperform their competition.
Rugged and durable bronze cases provide the Positive Displacement Meters, a solid base for years of unsurpassed service. With the basics covered, the only decision left to make is which of the Hersey reading systems you need. Whether it’s the standard visual read register or the Translator Encoder register with any of the available Hersey radio read systems, you’ll get the same great tamper protection and Hersey quality that’s been available for over 140 years.
Wellspring Point-Of-Use Water Meters
Wellspring designs and manufactures a family of submetering and control products which employ an open protocol 2-way radio that complies with IEEE 802.15.4 and ZigBee radio standards.
The Aqura (pronounced Ak-ur-a) submeter marries the Wellspring radio with microprocessor based algorithms and a precision flow sensor made by SIKA of Germany. SIKA has been designing and manufacturing laboratory temperature and flow sensors for over 100 years.
The SIKA turbine flow sensor includes an internal pump that cools and lubricates a sapphire thrust bearing, and two PEEK sleeve bearings. This patented high-tech bearing system allows the SIKA sensor to perform predictably and repeatably throughout its range from 0.25 to 8.0 gpm, meeting IAPMO, ASME, ANSI, AWWA and NIST accuracy standards. At typical residential system flow rates, pressure loss is under 4 psi.
Aqura submeters may be applied in any water line that experiences less than 8 gallons per minute of maximum flow, including the main line feed of most 1 and 1.5 bathroom apartments, hot water heaters, and appliances. If flow rates are expected to exceed 8 gpm, use of larger water meters and Wellspring Energy Monitors (one Monitor for every 4 meters) are recommended.
It is often necessary to meter hot and cold water separately, because existing plumbing systems lack a single line feed or single shut-off valve. This can be done with two flow sensors, and only one Aqura radio. If each apartment unit has a hot water heater, Wellspring recommends application of meters at the cold feed to the heater, at each toilet, and at the cold feed to the clothes washer. This approach (2 or 3 meters per unit) captures 90% of water use, missing only the cold water fed to the sinks and cold side of the tub/shower.
If both cold and hot water enter the apartment through shared riser pipes, metering of the tub, shower, toilet, kitchen hot and laundry are recommended (4 to 5 meters per unit). Metering of the cold-water feed to the kitchen, and either cold or hot in the bathroom lavatory capture very little usage. This point-of-use metering approach allows recovery of water AND domestic hot water energy use, which aggregate to a value that justifies the higher cost of multiple meters over a payback period that is usually less than 2 years.