Enter the field reading
Record stabilized cylinder temperature and pressure, select the pressure basis, and add elevation when it is useful to your gauge-pressure conversion.
For qualified HVAC/R technicians
Pressure–temperature
field screening.
WALRUS ranks supported refrigerants by how closely their modeled saturation behavior agrees with a stabilized cylinder temperature and pressure. It works entirely on-device, wherever the work is.
Screening only · Not a laboratory test · No account required
See agreement, not a verdict
WALRUS presents Close, Possible, and Weak agreement bands. Several candidates—or none—may fit a single P–T reading.
Keep the work offline
The comparison engine, reference data, and local history work without a connection. Optional feedback is the only user-initiated network feature.
App Store preview
See the screening workflow in action.
Enter a stabilized field reading, compare pressure–temperature agreement, inspect candidate detail, and keep recent comparisons on-device.
24-second preview · Plays muted · Use the controls for sound
App screens
Swipe or scroll to explore
Home 
Field reading 
Close agreement 
Similar candidates 
Blend detail 
How ranking works 
Local history
A useful boundary
A P–T reading can narrow possibilities. It cannot establish what is in a cylinder.
WALRUS does not establish identity, composition, purity, contamination, safety, equipment compatibility, or suitability for charging, reuse, resale, recovery, reclamation, disposal, or venting. For those decisions, follow applicable law and the cylinder, equipment, refrigerant manufacturer, and safety-data-sheet instructions. When verification matters, use the appropriate analyzer or qualified laboratory.
Professional-use and safety limitationsDesigned for field reality
Built around the conditions that change a reading.
- Pressure basis matters. Gauge and absolute pressure are explicitly distinguished.
- Blends have range. Bubble and dew behavior is considered for supported zeotropic blends.
- Conditions matter. Stabilization, liquid-vapor equilibrium, elevation, instrument calibration, weather, contamination, and non-condensables can change agreement.
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