Closed gauging equipment for Oil / Chemical tanker

Closed cargo equipment is part of the vapor control system (VAPOUR CONTROL SYSTEMS) on board oil/chemical vessels. Currently, ports gradually raising standards for oil / chemical vessels must gradually complete the steam control system, which refers to closed cargo equipment.

So how are closed goods equipment defined?

According to DNV, the devices include:
- Sec. 3 –Instrumentation
  - A. Cargo Gauging
    - A 100 Cargo Tank Gauging Equipment
  - B. Cargo Tank Level Alarms
    - B 100 High level alarm
    - B 200 Overfill Alarm
  - C. Vapour Pressure Alarms
    - C 100 General

It states:

Closed goods measuring system: (1) Do not require opening the tunnel when measuring goods, (2) Display the level on the cargo chamber.
9598% system: Independent of 95 and 98% simultaneously independent of other systems
Cargo tunnel pressure alarm: Display and alarm the pressure of the cargo in the cargo chamber

In addition, in order to serve as a closed goods, some other regulations require the device to report the temperature of the cargo, but it does not require a specific tunnel to attach how many temperature indicators. Ships often choose the index at a deck distance of 2m to the middle of the cargo deck.