Petrol Pal Go
A quick, clear answer for everyday riders and drivers.
- Three lights: green good, white unclear, red check
- Works on its own — no phone needed
- Small enough for a glovebox or a pocket
₹1,200₹1,850Early-bird
Join the waitlist for GoComing soonPetrol Pal Go · Petrol Pal Pro
Know what’s in your tank.
A pocket tester that measures the ethanol in your petrol, right at the pump. Fill the cap, dip, and read the answer in seconds.
Early-bird from ₹1,200 for people on the waitlist. No payment now.
Concept renders · final hardware may differ
The problem
Petrol is now E20. You can’t see the difference.
The petrol sold across India is blended with about 20% ethanol. Ethanol mixes completely with petrol, so a different blend looks, smells and pours the same.
Until now, checking what you paid for meant sending a sample to a lab. Petrol Pal puts that check in your pocket.
How you use it
Fill. Dip. Read.
The clear cap that protects the sensor is also the sample cup. There’s nothing else to carry.
- 01Fill
Take the cap off and fill it to the line with a little petrol from the nozzle.
- 02Dip
Press the button and dip the gold paddle into the cap.
- 03Read
Pro shows the ethanol percentage. Go lights up green, white or red.
Petrol Pal Pro · 1/7Engineered from the sensor out.Every part has one job, and nothing is there for show. Keep scrolling to take it apart.
The sensor
Two gold combs, one millimetre apart.
The sensing paddle is an interdigitated electrode: two combs of gold fingers that interlock without touching. Petrol fills the gaps, and the paddle measures how much electric charge the sample can hold.
- Sensing area
- 40 × 20 mm
- Finger pitch
- 2 mm per comb
- Gap between combs
- 1 mm
- Temperature
- NTC on the tip
The science
Ethanol holds about twelve times more charge than petrol.
Every liquid stores some electric charge in an electric field. Petrol stores very little; ethanol stores far more. So the more ethanol in the sample, the more charge the paddle holds. Petrol Pal measures that, corrects it for temperature, and turns it into an ethanol percentage.
Two models
Which Petrol Pal is yours?
Petrol Pal Pro
The exact number, for enthusiasts and fleet owners.
- Screen shows the exact ethanol percentage
- Scan its QR code to add your test to the map
- Bluetooth link to your phone
₹2,500₹3,250Early-bird
Join the waitlist for Pro
Your test · Alandur, Chennai
Test uploaded ✓
Counts toward this pump’s resultPart of something bigger
Every Pro test can help everyone.
After a test, Pro shows a QR code. Scan it with your phone and your result is added to the Petrol Pal map — no app, no account. When enough people test a pump, everyone can see how it compares with E20.
19,346 pumps already on the map
Open the mapDatasheet
Design targets
Petrol Pal is in development. These are the specifications we are designing towards. Final figures will be published after testing.
| All values are targets | Go | Pro |
|---|---|---|
| What it tells you | Three lights: green good, white unclear, red check | Ethanol % on screen, against the E20 band |
| Measuring range | Around the E20 band | 0–40 % ethanol |
| Resolution | — | 0.1 % |
| Accuracy | ±2 % ethanol | ±1 % ethanol |
| Time to result | Under 10 seconds | Under 10 seconds |
| Temperature correction | 10–50 °C, sensor in the fuel | 10–50 °C, sensor in the fuel |
| Sensor | Gold interdigitated electrode, 40 × 20 mm | Gold interdigitated electrode, 40 × 20 mm |
| Sample | About 5 ml in the clear cap | About 5 ml in the clear cap |
| Adds tests to the map | No | Yes, by QR code |
| Bluetooth | No | Bluetooth LE |
| Power | Two AAA cells · ~3,000 tests | Two AAA cells · ~1,200 tests |
| Size (body) | 34 × 98 × 15 mm | 38 × 118 × 18 mm |
| Length with paddle | 150 mm | 176 mm |
| Weight with cells | ~60 g | ~80 g |
| Splash resistance | IP54 | IP54 |
| Colours | White, Black | Black, White |
Early bird
Lock in the early-bird price.
Join the waitlist today. When orders open, you’ll be offered the early-bird price for your first device. No payment now, and no obligation to buy.
Petrol Pal Go
₹1,200₹1,850
Petrol Pal Pro
₹2,500₹3,250
Questions
When can I buy one?
We’re finishing the design and testing prototypes now. Everyone on the waitlist hears first when orders open.
How does the early-bird price work?
Join the waitlist now. When orders open, you’ll be offered the early-bird price — ₹1,200 for Go or ₹2,500 for Pro — for your first device. There’s nothing to pay until then, and no obligation to buy.
Is this a lab test?
No. Petrol Pal is a consumer device that gives you a quick indication at the pump. It isn’t a certified laboratory test.
What does it measure?
The share of ethanol in petrol. It doesn’t test for other substances, but an unusual reading is a sign worth checking.
Why are the specifications “targets”?
Petrol Pal is still in development. The numbers on this page are what we are designing towards; we’ll publish confirmed figures once testing is done.
What batteries does it use?
Two standard AAA cells, available everywhere. There is nothing to charge.
Do I need the app or an account?
No. Go works on its own. With Pro, you can scan its QR code to add a test to the public map — no app or account needed.