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GET /v1/ohnesorge

Ohnesorge number & inkjet Z

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10 free calls per day — no sign-up, no API key. Goes through the oanor gateway.

Custom headers (optional)
api.oanor.com/weber-api

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Code snippets

curl "https://api.oanor.com/weber-api/v1/ohnesorge" \
  -H "x-oanor-key: oanor_test_..."
await fetch("https://api.oanor.com/weber-api/v1/ohnesorge", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
$ch = curl_init("https://api.oanor.com/weber-api/v1/ohnesorge");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);
import requests
requests.get(
    "https://api.oanor.com/weber-api/v1/ohnesorge",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "note": "Oh = μ/√(ρ·σ·L) = √We/Re — viscous forces vs inertia and surface tension. In inkjet, the printability number Z = 1/Oh; good drop formation is roughly 1 < Z < 14.",
        "inputs": {
            "length": 0.001,
            "density": 1000,
            "viscosity": 0.001,
            "surface_tension": 0.0728
        },
        "z_number": 269.814751,
        "ohnesorge_number": 0.0037062466
    },
    "meta": {
        "timestamp": "2026-06-05T19:50:28.038Z",
        "request_id": "bd37d101-4b9b-417f-abb4-f028089cd2ac"
    },
    "status": "ok",
    "message": "Ohnesorge number",
    "success": true
}