ETENWOLF T300 Digital Tire Gauge Accuracy Test Report (0–200 PSI, 3-Sample)

Document Overview

Key Findings All three T300 digital tire gauge samples demonstrated measurement accuracy within ±0.2 psi across the full 2.6–192 psi operating range, confirming consistent precision performance for consumer use. Product: ETENWOLF T300 Digital Tire Gauge Test Date: 2025-05-08 Pressure Range Tested: ~2.6 psi to ~192…

Document type

Test Report

Prepared by

Kevin Marshall

Published

July 21, 2026

Last reviewed

July 21, 2026

Topics

Motor Performance

Key Findings

All three T300 digital tire gauge samples demonstrated measurement accuracy within ±0.2 psi across the full 2.6–192 psi operating range, confirming consistent precision performance for consumer use.

• Product: ETENWOLF T300 Digital Tire Gauge
• Test Date: 2025-05-08
• Pressure Range Tested: ~2.6 psi to ~192 psi
• Reference Standard: 2 L calibrated pressure tank with reference pressure gauge
• Samples Tested: 3 units (1#, 2#, 3#)
• Maximum Observed Deviation: −0.19 psi (Sample 2#, row 4, 15.4 psi reading)
• Verdict: All samples PASS — deviations remain within ±0.2 psi throughout the entire range

Test Overview

Test Equipment & Setup

Test Procedure

1. Pre-test preparation: Label three T300 units as 1#, 2#, and 3#. Verify the reference pressure gauge calibration and confirm the 2 L inflation tank is serviceable.
2. Pressure setting: Inflate the 2 L tank to the first target pressure point. Allow pressure to stabilize.
3. Reference reading: Record the reference gauge display value (psi) as the ground-truth pressure.
4. DUT reading: Connect the T300 unit under test to the tank valve and record the displayed psi value.
5. Deviation calculation: Calculate the difference: Δ = DUT display − reference gauge reading.
6. Repeat across range: Repeat steps 2–5 at all 35 pressure set-points from approximately 2.6 psi to 192 psi, covering low, mid, and high pressure regions.
7. Sample rotation: Complete all 35 points for sample 1#, then repeat the full sequence independently for samples 2# and 3#.
8. Post-test: Release pressure from the tank safely. Record all values in the test sheet.
9. Acceptance criteria: All deviation values (Δ) must fall within ±0.2 psi across the full tested range for a PASS result.

Test Data & Results

The table below presents all 35 measurement points for each of the three samples. Column headers: No. = sequence number; Tank = pressure source; Ref. (psi) = reference gauge reading; Display (psi) = T300 display reading; Δ (psi) = deviation (display − reference).

Observations: Deviations across all three samples are consistently negative (product reads slightly low) at pressures below approximately 45 psi, transitioning to near-zero or slightly positive deviations above 100 psi. The largest single deviation recorded was −0.19 psi on sample 2# at ~15.4 psi. No deviation at any point exceeded ±0.2 psi. Sequence numbers 8, 15, 22, and 29 are absent from the source data, indicating those pressure set-points were not tested or were omitted from the original worksheet.

Conclusion

Document Information

Frequently Asked Questions

How accurate is the ETENWOLF T300 digital tire gauge?

Lab testing across 35 pressure points from approximately 2.6 psi to 192 psi confirmed that all three T300 samples stay within ±0.2 psi of a calibrated reference gauge. The largest recorded deviation was only −0.19 psi, making the T300 suitable for precise tire inflation work across passenger, SUV, and light truck applications.

What pressure range does the T300 tire gauge cover?

The T300 was tested from approximately 2.6 psi up to 192 psi against a 2 L calibrated pressure tank. It is rated for up to 200 psi, covering virtually all consumer and light commercial tire inflation requirements.

Does the T300 read high or low compared to a reference gauge?

At lower pressures (below ~45 psi) the T300 tends to display slightly below the reference value — typically 0.05–0.16 psi under. At higher pressures (above ~100 psi) the display is essentially on-target or marginally above the reference value. All deviations are within the ±0.2 psi acceptance band throughout the full range.

How many samples were tested in the T300 accuracy report?

Three production samples (labeled 1#, 2#, and 3#) were each measured at 35 discrete pressure set-points for a total of 105 individual measurements. All three units passed the accuracy requirement independently.

Related Products

• ETENWOLF T300 200 PSI Digital Tire Gauge — Product Page
• ETENWOLF Pressure & Measurement Product Line