BRANDCO FIELD RESOURCES
Wireless vs Analog Pressure Gauges for Fire Testing
The most useful difference between a wireless gauge and an analog gauge is often where the reading can be seen. An analog dial provides a local indication. A wireless sender makes a pressure measurement available at a separate display. For fire testing, that can put a remote hydrant, roof, or equipment-room reading beside the person coordinating the test.
Compare the job, not just the screen
Local analog readings
A conventional mechanical gauge provides a direct visual indication at its connection point without a radio link. It can be an effective test instrument when its range, accuracy, readability, and condition suit the task. If the operator is elsewhere, a second observer may need to relay the reading. The team must agree on when to read and how to identify each test condition.
Wireless digital readings
A sender and remote display separate the measurement point from the viewing position. This can reduce walking and the need to relay numbers verbally. It also adds checks for battery condition, communication, correct sender identification, and update behavior. A clear number on a screen is useful only when the operator knows where it came from and that the reading is current.
Accuracy is a specification, not a display style
Neither a needle nor a digital screen guarantees better accuracy. Compare the actual specification and the pressure range. Ashcroft's gauge selection guide explains full-scale accuracy and the role of readability. A percentage of full scale differs from a percentage of the displayed reading, particularly near the bottom of the range.
Brandco lists the Pressure Sender Mini as a 0–300 psi instrument with 0.5% full-scale accuracy. For illustration, 0.5% of a 300 psi span is 1.5 psi; it is not 0.5% of every reading. That arithmetic explains the specification rather than establishing whether the instrument meets a particular test's requirements. Confirm the required accuracy, range, and calibration documentation for the job.
Using Brandco during a fire test
Connect a pressure sender at the approved measurement point using suitable rated fittings. Identify that sender on the Universal Remote Display before starting. Take the display to the intended work position and verify reception there. Keep the instrument within its working range and use the applicable product guide for setup.
The Dual Wireless Water Pressure Gauge set provides two pressure measurement points on one display. A hydrant test might use one point for static/residual pressure and another for a compatible flow device. A PRV test may instead need inlet and outlet pressure. In either case, label the locations explicitly; two numbers are not meaningful without their measurement points.
Brandco's display guide describes manually recording results and recalling up to 10 records. Add those readings to the complete test report with dates, locations, flow, instrument details, and conditions. The stored readings do not automatically provide all of that context.
What to check before choosing equipment
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Pressure range, including expected operating conditions and transients.
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Required accuracy and current calibration evidence.
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Compatible connections and suitability for the environment.
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Visibility from the operating location and the need for simultaneous readings.
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Battery endurance, radio reception, and the site's communication plan.
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The report format and the information that must be captured.
The advertised maximum wireless distance is a condition-dependent capability. Brandco specifies up to 3,000 ft line of sight at the maximum range setting; structures and equipment can reduce usable range. Longer range settings also change update speed. Verify performance at the actual test locations instead of using the advertised distance as a building-penetration guarantee.
Frequently asked questions
Does wireless testing eliminate the second technician?
It can remove the need for someone whose only task is reading a remote gauge. Staffing must still cover discharge control, site access, equipment operation, and the applicable test procedure.
Can a digital reading replace calibration?
No. Both digital and mechanical instruments need appropriate verification and maintenance. Use the applicable test requirements and manufacturer guidance; Ashcroft notes that service conditions affect calibration needs.
Can Brandco display GPM from any pressure reading?
No. A valid flow calculation needs a suitable flow device and its correct configuration. Static or residual system pressure alone does not determine discharge flow.
Related resources
Hydrant flow test staffing · Pitot vs pitotless vs diffuser testing
References
Ashcroft pressure-gauge selection · Brandco display modes · Brandco settings guide