Remote Hydraulic Systems Performance Monitoring

Frequently Asked Questions

How does vented gauge pressure sensing technology maintain measurement accuracy in sealed hydraulic circuits subject to shifting barometric pressure? 

Hydraulic circuits often operate under extreme environmental conditions where changing barometric pressures or sealed ambient enclosures can skew absolute pressure readings. The PM-HS sensor head incorporates a media-isolated 316L stainless steel piezoresistive element paired with an integrated vent tube within the cable assembly or housing. This design allows the internal reference side of the piezoresistive diaphragm to continually equalize with ambient atmospheric pressure. As a result, the sensor compensates for barometric variations, delivering precise relative line pressure measurements across configured ranges up to 1000 bar without atmospheric offset drift.

What process thread options are available for retrofitting the sensor onto hydraulic power units and manifold blocks? 

The sensor head features heavy-duty direct-threaded process connections available in standard 1/4 inch NPT/G or 1/2 inch NPT/G male configurations. Field technicians can thread the sensor head directly into high-pressure test ports, valve manifold blocks, pump discharge lines, or accumulator test points. The 316L stainless steel construction ensures high burst pressure tolerances and metal-to-metal sealing capable of enduring high-frequency pressure pulsations without fluid leakage.

How does the PM-HS system detect and record high-speed peak pressure surges within fluid power lines? 

Hydraulic systems experience rapid transient spikes (water hammer or shockwaves) caused by fast-acting directional valves or sudden mechanical load stops. The internal processor of the PM-HS device utilizes high-frequency sampling firmware that continuously monitors fluid pressure signals. When a surge crosses preset operational boundaries, the sensor captures the peak pressure spike event, increments the fluid pulsation count, and packages these transient metrics into the telemetry frame sent to the Ellenex Software Platform for rapid diagnostic evaluation.

How does the Ellenex Software Platform notify plant engineers when hydraulic pressure falls below operational limits? 

The Ellenex Software Platform includes a flexible, real-time alert management module. Plant engineers set custom high and low operational pressure limits along with minimum baseline thresholds for specific machinery operating cycles. If line pressure drops unexpectedly—indicating oil leaks, pump suction cavitation, or a blown pressure relief valve—the platform immediately dispatches multi-channel alerts via SMS, email, or mobile app notifications to site maintenance personnel.

Which wireless protocol option is best suited for mobile heavy equipment versus stationary factory press lines? 

The solution provides two LPWAN hardware choices: LoRaWAN (-L) and Cellular LPWAN (-N) supporting NB-IoT and LTE Cat-M1. For stationary industrial plants, factory press lines, or concentrated processing facilities, the LoRaWAN option (-L) connects to a local Ellenex Outdoor Gateway, establishing a robust private network with zero recurring SIM fees. For mobile construction fleets, mining excavators, or geographically distributed oil and gas valve actuation sites, the Cellular LPWAN option (-N) provides direct cell tower transmission with active network roaming across broad geographic territories.

How does automated hydraulic pressure tracking help prevent catastrophic pump cavitation? 

Pump cavitation occurs when fluid supply pressure drops below the vapor pressure of the hydraulic oil, causing air bubbles to form and collapse violently against internal pump impellers and pistons. By continuously monitoring pump inlet and supply line pressures, the PM-HS system detects early pressure drops that precede cavitation. Automatically alerting operators to restricted suction filters or low reservoir fluid levels allows corrective action before cavitation destroys internal pump components.

What battery preservation techniques enable up to 10 years of continuous operation on heavy industrial machinery? 

The PM-HS system is powered by an internal replaceable 3.6V Lithium primary battery (LiSOCl2) designed for long-term stability in high-vibration and extreme temperature environments (-30°C to +55°C). Firmware power management keeps the device in a deep sleep mode during normal operation. At scheduled transmission intervals (or upon dynamic threshold breach triggers), the unit wakes up, energizes the piezoresistive sensor, captures pressure and peak spike data, broadcasts the encrypted payload via LPWAN, and immediately returns to deep sleep. This optimized cycle supports up to 10 years of autonomous operational life