PRV & Pressure Control Station Monitoring

Frequently Asked Questions

How does a media-isolated 316L stainless steel piezoresistive sensing head capture fluid pressure without risking internal contamination?

The sensing element incorporates a piezoresistive silicon die contained behind a flexible, media-isolated 316L stainless steel diaphragm filled with silicone oil. As pressurized water from the pipeline contacts the exterior diaphragm, force is transferred through the oil fill to the internal silicon chip without exposing delicate electronic circuitry to raw water. The resulting mechanical deformation alters the electrical resistance of Wheatstone bridge circuits printed on the chip, generating a precise, temperature-compensated voltage signal that is digitized and converted into engineering pressure units (bar, kPa, or PSI).

What process connection thread options are used to install the pressure transducers into pressurized water mains?

The PM-PRV series features standard industrial threaded connections, including 1/4 inch NPT/BSPP male or 1/2 inch NPT/BSPP male fittings. Installers screw the sensor heads directly into tapping saddles, pressure test tees, or isolation ball valves positioned upstream and downstream of the pressure reducing valve assembly. This robust metal-to-metal thread connection creates a reliable, high-pressure seal capable of handling harsh hydraulic transients and water hammer conditions.

How does the dual-channel configuration calculate pressure differential across a modulating PRV?

The system utilizes two independent pressure measurement channels to monitor hydraulic activity across the valve body. Channel 1 samples high-pressure inlet water from primary supply mains, while Channel 2 measures regulated downstream pressure delivered to district metered areas. The Ellenex Software Platform automatically computes the real-time differential value (Inlet Pressure minus Outlet Pressure), allowing operators to verify whether the control valve is maintaining the correct pressure reduction ratio during changing demand periods.

How does the Ellenex Software Platform process real-time alerts when a pressure transient or pipe rupture occurs?

The Ellenex Software Platform incorporates an advanced event notification rules engine. Operators establish customized upper and lower pressure thresholds alongside rate-of-change delta limits. If a rapid pressure wave passes through the pipeline due to sudden valve closures, or if downstream pressure drops rapidly following a major pipe burst, the platform immediately triggers automated alerts via SMS, email, or mobile app push notifications, enabling rapid emergency dispatch.

Why are sub-GHz LoRaWAN and NB-IoT technologies effective for underground concrete PRV vaults?

Subterranean concrete chambers severely damp standard high-frequency wireless signals. The LoRaWAN option (-L) utilizes sub-GHz Chirp Spread Spectrum (CSS) radio signals, which easily penetrate thick concrete vault covers to reach external gateway antennas. The Cellular LPWAN option (-N) leverages NB-IoT, which offers a +20 dB link budget improvement specifically designed to penetrate deep underground environments, ensuring direct-to-tower connectivity from subterranean control pits.

In what ways does continuous PRV data logging reduce non-revenue water (NRW) in municipal networks?

Excessive distribution pressure directly increases background pipe joint leakage and accelerates main failure rates. By streaming uninterrupted, high-resolution pressure data from district metered areas to the Ellenex Software Platform, water engineers can optimize PRV pilot settings to lower night pressures during low-demand hours. Lowering off-peak network pressure significantly reduces background water loss, extends pipe life, and provides exact hydraulic records for non-revenue water audits.

How does the sensor's internal power management achieve up to 10 years of continuous operation in field vaults?

The PM-PRV unit is powered by an internal, replaceable 3.6V Lithium primary battery (LiSOCl2) designed for extreme ambient conditions (-30°C to +55°C). Controlled by low-power firmware algorithms, the transmitter remains in a deep sleep state between sampling cycles. At pre-set transmission intervals, the device wakes up, energizes the piezoresistive sensor, captures pressure readings, broadcasts the encrypted data packet via LPWAN, and immediately returns to deep sleep. This ultra-efficient power routine allows the battery to operate continuously for up to 10 years without external DC power or solar panels.