描述

Type SFJ-B Depth And Weight Indicator For Fast Line

Functions：

‑ Detect fast‑rope movement on sand‑grabbing sheave.

‑ Detect & display fast‑rope ascending /descending speed.

‑ Detect & display fast‑rope ascending /descending depth.

‑ Detect & display dynamic load of hoisted/lowered object.

‑ Audible‑visual alarm for over‑speed, over‑depth and over‑load conditions.

‑ Audible‑visual alarm at preset depth close to ground.