Thikpo SMT108D
A low-cost digital-gauge machine for occasional DIY use. Its run-time limit makes it a poor fit for a busy shop.
Amazon $63.64$63.64
The Thikpo SMT108D is the better automotive smoke machine overall, rated 3.6 to 3.1. The Thikpo SMT108D leads on features. The Solary SD301E costs $3.65 less ($59.99 vs $63.64).
Prices were last checked November 9, 2026. Product prices and availability are accurate as of that date and are subject to change; the price and availability shown on Amazon or the retailer's site at the time of purchase apply. As an Amazon Associate we earn from qualifying purchases.
Solary SD301E
A cheap higher-pressure machine for intake and vacuum leaks. Its output is too high for EVAP testing without a regulator.
Amazon $59.99$59.99
Which should you buy?
- Choose the Thikpo SMT108D for features (built-in air pump, air-only mode, fluid included vs built-in air pump, fluid included).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every no EVAP mode stated automotive smoke machine; a clear win is highlighted. How we rank explains each one.
| Factor weight | Thikpo SMT108D | Solary SD301E |
|---|---|---|
| Overall rating | 3.6/5 | 3.1/5 |
| Value 30% | 90 $63.64 | 93 $59.99 |
| Pressure coverage 25% | 50 pressure not published (neutral score used) | 50 up to 23 PSI |
| Measurement 20% | 60 digital pressure display | 0 no gauge or flow meter listed, scored as none |
| Features 15% | 65 built-in air pump, air-only mode, fluid included | 45 built-in air pump, fluid included |
| Warranty 10% | 0 warranty not published, scored as none | 0 1-year warranty |
Specifications
| Thikpo SMT108D | Solary SD301E | |
|---|---|---|
| Pressure and smoke | ||
| EVAP mode | - | No |
| Output pressure | - | 19-23 PSI |
| Smoke output | 30 L/min | - |
| Pressure display | Digital | - |
| Air-only mode | Yes | - |
| Power and fluid | ||
| Air source | Built-in pump | Built-in pump |
| Power | - | 12V battery |
| Smoke fluid | - | smoke oil |
| Fluid included | Yes | Yes |
| In the box | ||
| Warranty | - | 1 year |