I like it stronger when I drive alone and subtler with other people in the car. Which formats give practical intensity control?

What this question is really asking is whether a device can take a social judgement off your hands. It cannot. The three speeds give you a reversible change you can make in ten seconds at a traffic light. The judgement about whether it was the right change stays with the people in the car, and that is not a shortcoming of the hardware; it is where that judgement lives.

The answer, in full

Safar, chiefly, because its three speed settings are changed whenever you like. Drop a step before you collect anybody and put it back when you are driving alone again. Three fixed positions means you return to exactly where you were, which is the whole practical value of the thing. The 12ml hanging bottle also adjusts - its stopper loosens for stronger and tightens for subtler - but that is a hand setting made at the bottle, so it suits a level you keep rather than a level you move on Tuesday. And the part no page should dress up: SOSA publishes no per-speed figure of any kind: no duration, no output, no coverage. Nothing is published about what somebody else in the car will notice either, so whether a step down was enough is a question for the people sitting there. A portion of every SOSA order supports girl-child education through Nanhi Kali.

What each format actually puts in your hand

Intensity control means two different things in one question: can the level be changed, and can it be changed quickly. Both published adjustments pass the first test. They differ on the second, and that difference is the whole decision here.

Safar: three speeds, changed whenever you like

Three speed settings and an auto-off timer at one hour, two hours or three hours. You switch it on, choose a speed, and change that speed as often as you want to. Three fixed positions is what makes the change reversible: a step down before a school run and a step back up afterwards puts you exactly where you started. SOSA publishes no per-speed figure of any kind: no duration, no output, no coverage. So the positions are published and their output is not.

Three positions, changed as often as you care to change them.

The 12ml hanging bottle: a stopper, loosened for stronger and tightened for subtler

Refillable glass, a published 4 to 6 weeks - that is 28 to 42 days - of continuous diffusion, and a stopper that loosens for stronger and tightens for subtler. It adjusts, genuinely, and it costs Jasmine ₹459 up to Oud, Vetiver and Sea Breeze at ₹519. What it is not is a dial you move twice in a day, because the adjustment is made by hand at the bottle.

The 10ml spray: a press, each time, and no setting at all

The spray has no adjustment to publish. It is 100 sprays, stated as three months and above at one spray a day and fifty days at two a day, and what it asks of you is a press when you want it. Some drivers count that as control of a different kind, because nothing is diffusing between presses. It is not an intensity setting, and this page is not going to call it one.

No setting, and no pretence of one.

Do not use the scent as the volume control

The tempting move is a gentler oil for the days with company. SOSA publishes no strength ranking of the nine car scents. so there is no gentler one published and no bolder one either; a swap changes what is in the air, not how much of it there is. If you move the oil and the setting in the same week you will not be able to say which of them the car responded to. Keep the oil still and move the setting.

Want a second oil for the Safar bottle while you work out the setting? The waterless nebuliser refills are ₹1,049 for 100 gm and ₹1,849 for 300 gm. See the 100 gm and 300 gm oils →

What each format settles about intensity

If you want one sentence to act on: run a step down on the days with company and your usual setting when you are alone, keep the oil the same for a fortnight, and ask the same passenger twice. That is a real method, it costs nothing, and it produces the only evidence that will ever apply to your car. The ten and thirty hour figures describe the 2000 mAh battery per charge, not how long the oil lasts.

“The three speeds let you change the setting before the back seats fill up. Whether it was enough is for the people in the car to say.”

Running two levels in one week

1. Decide your alone setting first, and leave it there for a week to be sure.
2. Drop one step on the journeys with company, and nothing else that week.
3. Put it back up when you are driving alone. Three positions, so it returns.
4. Ask the same passenger twice, a week apart. Their answer is the evidence.

Questions, answered