ETENWOLF S1 Tire Inflator Accuracy Test — Basketball Inflation (Unit S1-1#)

Document Overview

Key Findings The ETENWOLF S1 portable tire inflator (unit S1-1#) completed 10 basketball inflation accuracy tests on 2025-08-15, achieving stop pressures within −0.1 to −1.1 PSI of preset targets across a 0–9 PSI working range. Product: ETENWOLF S1-1# Portable Tire Inflator Test type: Pressure accuracy…

Document type: Test Report
Prepared by: Daniel Wright
Published: July 22, 2026
Last reviewed: July 22, 2026
Topics: Motor Performance

Key Findings

The ETENWOLF S1 portable tire inflator (unit S1-1#) completed 10 basketball inflation accuracy tests on 2025-08-15, achieving stop pressures within −0.1 to −1.1 PSI of preset targets across a 0–9 PSI working range.

Product: ETENWOLF S1-1# Portable Tire Inflator
Test type: Pressure accuracy — basketball inflation
Pressure range tested: 0–9 PSI
Number of test runs: 10
Accuracy deviation range: −0.2 to −1.1 PSI
5-second hold pressure drop: 0 to −0.1 PSI across all runs
Overall verdict: All runs completed; deviations recorded for engineering review

Test Overview

Item	Detail
Test Date	2025-08-15
Test Type	Pressure Accuracy — Basketball Inflation
Sheet Name	S1-1#-蓝球 (S1-1# Basketball)
Product	ETENWOLF S1 Portable Tire Inflator
Unit / Sample ID	S1-1#
Inflation Target Object	Basketball (篮球)
Tester Organization	BTK
Source File	S1-精度测试-2025.8.15.xlsx
Sheet Index	2 of 4
Total Data Rows	10

Test Equipment & Setup

Parameter	Detail
Inflator Unit	ETENWOLF S1-1# Portable Tire Inflator
Inflation Object	Standard basketball
Pressure Unit	PSI (pounds per square inch)
Preset Pressure Range	3 PSI – 9 PSI
Inflation Range per Run	Incremental segments from 0 PSI up to maximum 9 PSI
Hold Duration for Stability Check	5 seconds post-stop
Measured Parameters	Inflation range (PSI), preset target pressure, stop pressure, 5-second hold pressure, hold-pressure delta, accuracy delta

Test Procedure

Pre-test: Confirm basketball is at or near the lower bound of the target inflation range. Verify inflator unit is S1-1# and pressure display reads correctly.
Set preset pressure: Enter the target stop pressure (PSI) into the inflator before each run.
Inflate: Connect the inflator nozzle to the basketball valve and begin inflation from the recorded starting pressure up to the preset target.
Record stop pressure: Note the actual pressure at which the inflator automatically stops (PSI).
5-second hold check: Allow 5 seconds after stop, then record the stabilized hold pressure (PSI).
Calculate hold-pressure delta: Subtract stop pressure from 5-second hold pressure to assess short-term pressure retention.
Calculate accuracy delta: Subtract preset target pressure from the 5-second hold pressure to determine final accuracy deviation.
Post-test: Deflate basketball to the next starting pressure as required and repeat for all 10 runs.
Acceptance criteria: Accuracy deviations are recorded for engineering review; results are compared against product specification tolerances.

Test Data & Results

No.	Object	Inflation Range (PSI)	Preset Pressure (PSI)	Stop Pressure (PSI)	5-Second Hold Pressure (PSI)	Hold-Pressure Delta (PSI)	Accuracy Delta (PSI)
1	Basketball	0–3	3	2.3	2.3	0.0	−0.7
2	Basketball	3–6	6	5.5	5.4	−0.1	−0.6
3	Basketball	6–8	8	7.4	7.3	−0.1	−0.7
4	Basketball	8–9	9	8.9	8.8	−0.1	−0.2
5	Basketball	0–4	4	3.1	3.0	−0.1	−1.0
6	Basketball	4–6	6	5.4	5.3	−0.1	−0.7
7	Basketball	0–5	5	4.0	3.9	−0.1	−1.1
8	Basketball	5–7	7	6.5	6.4	−0.1	−0.6
9	Basketball	7–8	8	7.7	7.6	−0.1	−0.4
10	Basketball	8–9	9	8.9	8.8	−0.1	−0.2

Observations: All 10 runs show the inflator stopping below the preset target, with accuracy deviations ranging from −0.2 PSI (runs 4 and 10, target 9 PSI) to −1.1 PSI (run 7, target 5 PSI). The 5-second hold-pressure delta is consistently −0.1 PSI or 0.0 PSI, indicating stable short-term pressure retention after shutoff. Lower preset targets (3–5 PSI) exhibit larger negative accuracy deviations, suggesting the inflator undershoots more at lower pressures during basketball inflation.

Conclusion

Item	Detail
Test Conducted	Pressure accuracy — basketball inflation, 10 runs
Unit Tested	S1-1#
Pressure Range	0–9 PSI
Accuracy Deviation Range	−0.2 PSI to −1.1 PSI (all negative; inflator consistently undershoots preset)
Hold-Pressure Stability (5 s)	0.0 to −0.1 PSI drop — stable across all runs
Notable Pattern	Larger undershoot observed at lower preset pressures (3–5 PSI range)
Verdict	Data recorded and available for engineering tolerance review against product specification

Document Information

Role	Name	Detail
Testing Organization	BTK	Identified in source document header
Author (Article)	Daniel Wright	daniel.wright
Source File	S1-精度测试-2025.8.15.xlsx	Sheet: S1-1#-蓝球 (index 2 of 4)
Report Date	2025-08-15
Article Published	2026-07-11

Frequently Asked Questions

What pressure accuracy can I expect from the ETENWOLF S1 when inflating a basketball?

In testing with unit S1-1#, the S1 consistently stopped within −0.2 to −1.1 PSI below the preset target across a 0–9 PSI range. The inflator tends to undershoot more at lower target pressures (3–5 PSI), while accuracy improves at higher pressures near 9 PSI.

Does the ETENWOLF S1 hold pressure steadily after it shuts off?

Yes. In all 10 basketball inflation test runs, the pressure 5 seconds after shutoff dropped by no more than 0.1 PSI compared to the stop pressure, indicating stable short-term pressure retention through the valve connection.

What PSI range does the ETENWOLF S1 support for basketball inflation?

The test covers a working range of 0–9 PSI for basketball inflation. The inflator accepts incremental preset targets within this range and automatically stops when the target is reached.

How does the S1-1# unit compare to S1-2# in basketball inflation accuracy?

This report covers unit S1-1# only. Accuracy results for unit S1-2# basketball inflation are documented in the sibling test sheet S1-2#-蓝球, which is linked in the Related Products section below.

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