ETENWOLF S1 Tire Inflator Precision Test Report — S1-6# Unit: Sedan Tire, Minivan Tire & Basketball (2025-09-18)
Document Overview
Key Findings The ETENWOLF S1 (unit S1-6#) pressure accuracy test conducted on 2025-09-18 shows that stop-pressure readings consistently fall within −2.7 to +0.2 PSI of preset targets across sedan tires, van tires, and basketballs, with pressure retention loss of ≤0.2 PSI over the hold period.…
Document type
Test Report
Prepared by
Daniel Wright
Published
Last reviewed
Topics
Motor Performance
Key Findings
The ETENWOLF S1 (unit S1-6#) pressure accuracy test conducted on 2025-09-18 shows that stop-pressure readings consistently fall within −2.7 to +0.2 PSI of preset targets across sedan tires, van tires, and basketballs, with pressure retention loss of ≤0.2 PSI over the hold period.
215/55R17 sedan tire; 165/70R13 van tire; Basketball
Total Data Rows
67
Test Environment
Not specified in source data
Test Equipment & Setup
Parameter
Detail
Unit Under Test
ETENWOLF S1-6# Portable Tire Inflator
Tire Sample A
215/55R17 sedan tire (轿车轮胎)
Tire Sample B
165/70R13 van / minivan tire (面包车轮胎)
Ball Sample
Standard basketball (篮球)
Pressure Unit
PSI
Preset pressure range — sedan / van
10 PSI to 40 PSI (various start points)
Preset pressure range — basketball
3 PSI to 9 PSI
Hold duration — tires
10 seconds post-stop
Hold duration — basketball
5 seconds post-stop
Recorded metrics
Inflation range (PSI), Preset target (PSI), Stop pressure (PSI), Hold pressure (PSI), Retention delta, Accuracy delta
Test Procedure
Pre-test: Verify unit S1-6# is fully charged and functional; confirm pressure gauge calibration; record ambient conditions.
Mount the appropriate nozzle adapter for the target (Schrader valve for tires; needle adapter for basketball).
Deflate the test tire or ball to the specified starting pressure of the inflation range (e.g., 0 PSI or intermediate value).
Set the preset target pressure on the S1 unit display to the value listed in the test plan.
Start inflation; the unit automatically stops when the internal sensor detects the preset pressure has been reached — record the stop pressure reading.
For tires: wait 10 seconds and record the retained pressure. For basketballs: wait 5 seconds and record the retained pressure.
Calculate retention delta = Stop pressure − Hold pressure.
Repeat for all preset targets listed in the test matrix (sedan rows 1–69, basketball rows 1–10).
Post-test: Inspect unit for anomalies; archive all readings in the source Excel file.
Acceptance criteria: Accuracy delta within ±3 PSI for tires; retention delta ≤0.2 PSI.
Test Data & Results
Section A — 215/55R17 Sedan Tire (S1-6#)
Row No.
Tire
Inflation Range (PSI)
Preset Target (PSI)
Stop Pressure (PSI)
Hold Pressure 10 s (PSI)
Retention Delta (PSI)
Accuracy Delta (PSI)
Notes
1
215/55R17 Sedan
0–10
10
7.8
7.7
0.10
−2.30
2
215/55R17 Sedan
10–15
15
13.6
13.5
0.10
−1.50
3
215/55R17 Sedan
15–20
20
18.7
18.6
0.10
−1.40
4
215/55R17 Sedan
20–25
25
23.7
23.6
0.10
−1.40
5
215/55R17 Sedan
25–30
30
28.5
28.4
0.10
−1.60
6
215/55R17 Sedan
30–35
35
34.1
34.0
0.10
−1.00
7
215/55R17 Sedan
35–40
40
38.9
38.8
0.10
−1.20
9
215/55R17 Sedan
0–11
11
10.1
10.1
0.00
−0.90
10
215/55R17 Sedan
11–16
16
14.6
14.5
0.10
−1.50
11
215/55R17 Sedan
16–21
21
19.7
19.6
0.10
−1.40
12
215/55R17 Sedan
21–26
26
24.6
24.5
0.10
−1.50
13
215/55R17 Sedan
26–31
31
29.5
29.4
0.10
−1.60
14
215/55R17 Sedan
31–36
36
34.7
34.6
0.10
−1.40
16
215/55R17 Sedan
0–12
12
10.6
10.5
0.10
−1.50
17
215/55R17 Sedan
12–17
17
16.0
15.9
0.10
−1.10
18
215/55R17 Sedan
17–22
22
21.0
20.9
0.10
−1.10
19
215/55R17 Sedan
22–27
27
26.0
25.9
0.10
−1.10
20
215/55R17 Sedan
27–32
32
30.6
30.5
0.10
−1.50
21
215/55R17 Sedan
32–37
37
35.8
35.6
0.20
−1.40
23
215/55R17 Sedan
0–13
13
12.0
11.9
0.10
−1.10
24
215/55R17 Sedan
13–18
18
16.8
16.7
0.10
−1.30
25
215/55R17 Sedan
18–23
23
21.7
21.6
0.10
−1.40
26
215/55R17 Sedan
23–28
28
26.8
26.7
0.10
−1.30
27
215/55R17 Sedan
28–33
33
31.8
31.6
0.20
−1.40
28
215/55R17 Sedan
33–38
38
36.5
36.4
0.10
−1.60
30
215/55R17 Sedan
0–14
14
12.2
12.1
0.10
−1.90
31
215/55R17 Sedan
14–19
19
16.4
16.3
0.10
−2.70
32
215/55R17 Sedan
19–24
24
22.5
22.4
0.10
−1.60
33
215/55R17 Sedan
24–29
29
27.3
27.2
0.10
−1.80
34
215/55R17 Sedan
29–34
34
32.5
32.4
0.10
−1.60
35
215/55R17 Sedan
34–39
39
37.3
37.2
0.10
−1.80
37
215/55R17 Sedan
0–15
15
13.7
13.6
0.10
−1.40
Section B — 165/70R13 Van / Minivan Tire (S1-6#)
Row No.
Tire
Inflation Range (PSI)
Preset Target (PSI)
Stop Pressure (PSI)
Hold Pressure 10 s (PSI)
Retention Delta (PSI)
Accuracy Delta (PSI)
Notes
38
165/70R13 Van
0–10
10
9.5
9.4
0.10
−0.60
39
165/70R13 Van
10–15
15
14.9
14.8
0.10
−0.20
40
165/70R13 Van
15–20
20
19.6
19.5
0.10
−0.50
41
165/70R13 Van
20–25
25
25.1
25.0
0.10
0.00
42
165/70R13 Van
25–30
30
30.1
30.0
0.10
0.00
43
165/70R13 Van
30–35
35
34.7
34.6
0.10
−0.40
44
165/70R13 Van
35–40
40
39.9
39.8
0.10
−0.20
45
165/70R13 Van
0–11
11
10.4
10.3
0.10
−0.70
46
165/70R13 Van
11–16
16
15.7
15.6
0.10
−0.40
47
165/70R13 Van
16–21
21
20.6
20.5
0.10
−0.50
48
165/70R13 Van
21–26
26
25.7
25.6
0.10
−0.40
49
165/70R13 Van
26–31
31
30.8
30.7
0.10
−0.30
50
165/70R13 Van
31–36
36
35.7
35.6
0.10
−0.40
51
165/70R13 Van
0–12
12
11.5
11.4
0.10
−0.60
52
165/70R13 Van
12–17
17
16.6
16.5
0.10
−0.50
53
165/70R13 Van
17–22
22
21.5
21.4
0.10
−0.60
54
165/70R13 Van
22–27
27
26.7
26.6
0.10
−0.40
55
165/70R13 Van
27–32
32
31.6
31.5
0.10
−0.50
56
165/70R13 Van
32–37
37
36.7
36.6
0.10
−0.40
57
165/70R13 Van
0–13
13
12.4
12.3
0.10
−0.70
58
165/70R13 Van
13–18
18
17.7
17.6
0.10
−0.40
59
165/70R13 Van
18–23
23
22.8
22.7
0.10
−0.30
60
165/70R13 Van
23–28
28
27.7
27.6
0.10
−0.40
61
165/70R13 Van
28–33
33
32.6
32.5
0.10
−0.50
62
165/70R13 Van
33–38
38
37.7
37.6
0.10
−0.40
63
165/70R13 Van
0–14
14
12.7
12.6
0.10
−1.40
64
165/70R13 Van
14–19
19
19.2
19.1
0.10
+0.10
65
165/70R13 Van
19–24
24
23.9
23.8
0.10
−0.20
66
165/70R13 Van
24–29
29
29.4
29.2
0.20
+0.20
67
165/70R13 Van
29–34
34
34.0
33.9
0.10
−0.10
68
165/70R13 Van
34–39
39
38.9
38.8
0.10
−0.20
69
165/70R13 Van
0–15
15
14.6
14.5
0.10
−0.50
Section C — Basketball (S1-6#)
Row No.
Object
Inflation Range (PSI)
Preset Target (PSI)
Stop Pressure (PSI)
Hold Pressure 5 s (PSI)
Retention Delta (PSI)
Accuracy Delta (PSI)
Notes
1
Basketball
0–3
3
2.5
2.4
−0.10
−0.60
2
Basketball
3–6
6
6.4
6.4
0.00
+0.40
3
Basketball
6–8
8
7.6
7.5
−0.10
−0.50
4
Basketball
8–9
9
8.5
8.5
0.00
−0.50
5
Basketball
0–4
4
3.4
3.3
−0.10
−0.70
6
Basketball
4–6
6
5.8
5.8
0.00
−0.20
7
Basketball
0–5
5
4.6
4.5
−0.10
−0.50
8
Basketball
5–7
7
6.2
6.1
−0.10
−0.90
9
Basketball
7–8
8
7.7
7.6
−0.10
−0.40
10
Basketball
8–9
9
8.8
8.8
0.00
−0.20
Observations: Sedan tire accuracy deltas are consistently negative, ranging from −0.9 to −2.7 PSI, indicating the unit stops slightly below the preset — most pronounced at lower starting pressures (rows 1 and 31). Van tire readings are notably tighter, with most deltas between −0.7 and 0.0 PSI and two slightly positive overshoots (+0.1, +0.2 PSI). Basketball deltas fall within −0.9 to +0.4 PSI. All pressure retention losses across tires and basketballs are ≤0.2 PSI, confirming reliable short-term seal integrity after the unit shuts off.
