Pressure Differential Gauge

Why use a Pressure Differential Gauge?

When screw anchoring, a torque reading is required to ensure the pile/pier has been screwed in at the correct specification. Project engineers will generallly demand that a specific torque amount is reached depending on what the piles or piers are being used for.

Traditionally, torque is calculated by a single sensor located at the hydraulic pump in the excavator. Unfortunately, this is not accurate as pressure is lost as oil travels up the boom through the drive unit and back again along the boom to the excavator. Pressure readings can be out by as much as 15-20% compared to actual working pressure.

Digital display of analogue signals
Clear 4-digit 7-segment LED display
Up to 3 analogue inputs ( 4.. 20mA or 0 .. 5 V)
Accuracy ≤ ± 0.5%
Differential measurement possible
Analogue output ( 4.. 20mA or 0 .. 10 V)
Up to 4 relay switching outputs
RS232 interface
Voltage supply - 12 .. 32V DC
Option for PT100 sensor input or frequency input

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Features & Benefits

Digga's Pressure Differential Gauge offers a more accurate way of measuring the true hydraulic pressure being applied through the hydraulic motor and gearbox of your drive unit. Hover your mouse over the features´ 'plus' symbol on the diagram below to reveal the respective benefits.

The system comprises of two sensors: The first sensor is located on the supply line at the entry to the drive unit. The second sensor is located on the return line where oil leaves the drive unit
A micro processor calculates the 'actual usable' pressure using the two sensors - giving a reading which is up to 12-15% more accurate than traditional methods
The reading is displayed in BAR or PSI depending on the option chosen at the time of purchase. This pressure read-out is compared to a supplied torque chart to obtain the equivalent torque reading in Nm