Hydraulic Load Cell Calibration: What Every Site Manager Needs to Know

Hydraulic load cells are a popular choice for monitoring programs on harsh or hard to access sites.

But like any other instrument, they need correct and scheduled calibration to provide meaningful data. Monitel’s consultants are experienced in calibrating hydraulic load cells and delivering the reports required by WA’s regulatory bodies.

This article explains what calibration is, why it matters and how our process ensures each hydraulic load cell performs reliably throughout its entire deployment. For more information or to discuss your site, contact Monitel.

What Is Calibration and Why Does It Matter?

Calibration is the process of verifying that a load cell is producing accurate force measurements within its working range. For a hydraulic load cell, this means ensuring internal fluid pressure corresponds precisely with the applied load.

Calibration is essential for any type of sensor, because with out it:

• Site managers may receive incorrect readings that either underestimate or overestimate force

• Data may not be an accurate reflection of field conditions

But most importantly, sensor data informs critical decisions. Should units be poorly calibrated, even a 5-10% deviation can cause misinterpretations that lead to structural failures, safety risks and regulatory violations.

How Monitel Consultants Perform Hydraulic Load Cell Calibration

At Monitel, our consultants calibrate hydraulic load cells in controlled environments, using widely accepted methods and traceable standards.

Our process looks like this:

1. Bench Setup: The load cell is installed in a test rig, where a known load is incrementally applied

2. Fluid Pressurisation: As each increment is applied, our consultants record rises in fluid pressure

3. Verification Against Standards: We compare the recorded levels against known force values to assess repeatability and accuracy

4. Curve Creation: We create a calibration curve that maps pressure to actual force, assisting them in assessing the sensor’s performance

5. Certificate Issued: Site managers are provided a full calibration report, detailing traceable references, performance metrics and recommendations for further action

What to Consider When Recalibrating in the Field

When recalibrating a hydraulic load cell that has already been deployed, Monitel consultants account for:

• Zeroing after installation, especially if the sensor is connected via long tubing runs or if fluid levels shift

• Any damage to surface indicators or abnormal readings, which could require gauge replacements

• Fluid chamber integrity checks, ensuring readings aren’t affected by air ingress or evaporation

Our team can also assist with calibrating vibrating wire and strain gauge load cells during staged loading or excavation phases.

Monitel’s Hydraulic Load Cell Services

Monitel designs monitoring solutions that address the operational realities of Western Australian projects. Our consultants provide end to end support that ensures accurate, reliable data throughout the length of the monitoring program.

Our services include:

• System design and sensor selection

• Installation, including on site verification

• Integration with data loggers and transducers

• Custom calibration for non-standard systems

• Ongoing support for maintenance, quality assurance and recalibration during multi-year projects

All sensors are calibrated prior to dispatch and delivered with compliance certificates.

To Discuss Your Project’s Requirements, Contact Monitel

Whether you’re designing a new monitoring program or verifying the stability of a decades old dam, Monitel consultants can assist with calibrating your load cells and gathering accurate data.

For more information about the price and availability of hydraulic load cells, contact Monitel today.

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