The current P20 Pro thermal specification graphic lists a 25Hz refresh rate. Use that as a manufacturer specification for this model, then verify how the supplied application displays, records and exports thermal output. Do not apply the number to every thermal phone.
Identify the three outputs
| Output | Question for the supplier |
|---|---|
| Thermal image stream | What rate of new thermal images is specified for this configuration? |
| Live display | How does the application present those images? |
| Recorded output | What is saved, and is its stated video rate distinct from new thermal frames? |
Agree on a repeatable sample check
Use the intended handset, firmware and thermal application. Record a representative moving scene using only the modes the supplier actually provides. Retain the original output and note settings. Ask the supplier to explain whether repeated frames or processing affect the saved stream.
Do not substitute the display specification
A screen refresh number alone does not establish thermal-image rate. FLIR explains that a display can repeat infrared images when its own rate is higher. Nor does the thermal frame rate describe temperature accuracy or detector response time.
For the terminology, see the thermal frame-rate verification guide. This article concerns acceptance of the P20 Pro's published 25Hz entry, not a measured latency or frame-rate result.
Sources
P20 Pro product specifications; FLIR: infrared image and display rates.
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