the least favorable sampling point

misc.

(煙検知器の文脈で)いくつかある煙採取ポイントのなかでも、煙が煙検出器に届くまでに時間の最もかかる煙採取ポイントのこと。煙が煙検出器に届くまでの時間という観点で最も不利な～。

https://www.notifierfiresystems.co.uk/docs/notifierfiresystems/en/gd/Honeywell%20Vesda%20VEP%20Engineering%20Specification%20Document%200219%20(1).pdf

5.1.3.1 Transport Time
Wherever possible the transport time (i.e. the time taken by smoke sampled to reach the detector) for the least favorable sampling point shall be less than 60 seconds for open hole sampling and less than 90 seconds for capillary tubes.