Reference Bar for Ultrasonic Pulse Velocity

Reference Bar for UPV Tester — Calibration Standard

The Reference Bar for Ultrasonic Pulse Velocity (UPV) Tester is a precision steel or acrylic calibration bar used to verify the calibration of UPV testers (Pundit, UPV Machine, and other ultrasonic instruments) before and after each test session as per IS 13311 Part 1 and BS 1881 Part 203. The reference bar has a known, stable transit time that allows the instrument to be zeroed and calibrated without testing actual concrete.

JS Civil Lab Solutions supplies reference bars matched to specific UPV tester models (Pundit Lab, UPV Tester 2, UPV Machine) and generic calibration bars for field use.

Specifications

• Material: Acrylic (standard) or stainless steel (high-accuracy)
• Known transit time: Engraved/labelled on bar (e.g., 25.0 μs or 20.4 μs)
• Surface finish: Flat, polished for direct transducer contact without couplant
• Dimensions: Varies by model — typically 100–200 mm length
• Compliance: IS 13311 Part 1, BS 1881 Part 203, ASTM C597

How to Use

Apply transducers to opposite ends of the reference bar, read the transit time on the instrument, and compare to the engraved reference value. If the displayed value differs by more than ±0.1 μs, check transducer coupling and recalibrate. This procedure must be carried out at the start and end of each day’s testing per IS 13311 Part 1.

Order

Contact JS Civil Lab Solutions at +91 93596 24761 for a reference bar matched to your UPV model. Suitable for Pundit Lab (794), UPV Tester (822), and generic IS 13311 applications.