Switch 03 Osmotic

Hario Switch 03 Hario switch by Hario

Hario's osmotic-style recipe uses the Switch 03 in dual phases: open-valve percolation establishes clarity and aromatic lift, while a later closed immersion deepens sweetness and body for a complex shared cup.

1:16.1 Ratio

4:15 Total

28g Dose

93°C Temp

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Parameters

28 g
Coffee: 450 g
Water: 1:16.1
Ratio: 93 °C
Temp: 5 medium
Grind: 4:15
Total: ~450 ml
Yield

Grind · 5/10 · medium

FINE COARSE

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Method

4:15 · total

Bloom 1 / 7
0:00

30s

Open the switch. Pour 80g in a spiral. Let it bloom.

+80g→ 80g Spiral 6.2g/s 13s Valve: Open 93°C
Pour 2 / 7
0:30

35s

Close the switch. Pour the final 370g gently to 450g.

+370g→ 450g Fill gently Valve: Closed
Swirl 3 / 7
1:05

20s

Stir 3 times.

Valve: Closed
Steep 4 / 7
1:25

1m35s

Let it steep.

1m 35s Valve: Closed
Prepare 5 / 7
3:00

10s

Open the switch.

Valve: Open
Wait 6 / 7
3:10

1m5s

Let the bed draw down completely.

1m Valve: Open
Done 7 / 7
4:15

Drawdown complete.

Notes

During the open phase, pour slowly near the center to maintain a modest water column and avoid eroding the bed. Close the valve only after that phase drains; if the final cup is heavy, shorten immersion or grind coarser.

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By

Hario

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In the cup