scope:

This specification covers the requirements for electrical liquid level sensing and indicating equipment for Naval shipboard use in fresh water, seawater, waste water, diesel fuel oil, distillate fuel oil, lubricating oil, contaminated oil, refrigerants, JP-fuel oil and various other fluids in low pressure and high pressure tanks.

The types of liquid level indicating equipment shall be designated in the following form, as specified (see 6.2):

The basic indicator for Naval interior communication continuous output equipment shall be designated "IC/CO".

The sensing technique used shall be denoted by letters assigned by NAVSEA. Examples include, but are not limited to, the following: Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 55Z3, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

AZ - Admittance/impedance MF - Magnetic float DP - Differential pressure

The fluid to be measured, as specified (see 6.2), shall be indicated as follows. The first two-letter designation identifies the fluid to be measured in the tank. The second two-letter designation identifies the liquid or gas which interfaces with the measured fluid.

Fluid Liquid or gas SW - Sea water RF - Refrigerants FW - Fresh water, potable water AR - Air WW - Waste water GA -Compressed air JP - JP-5, JP fuels CG Compressed gas LO - Lubricating oil HO Hydraulic oil GO - Contaminated oil ST - Steam WO - Waste oil FO - Fuel oil (diesel fuel oil, CF - Contaminated fuel distillate fuel oil, naval SO - Synthetic oil distillate, F-76, cargo oil, fuel)

The maximum ambient pressure under which the transducer shall operate (see 6.2) shall be designated as follows:

VP - Vacuum pressure of 30 inches mercury (762 millimeters mercury) to 100 pounds per square inch (lb/in²) (689 kilopascals (kPa)) inclusive. LP - From atmospheric pressure to 100 lb/in² (689 kPa) inclusive. HP - From 101 lb/in² (696 kPa) to maximum pressure as specified (see 6.2).

The output display required shall be designated (see 6.2) as follows:

A - Analog D - Digital G - Analog and digital

intended Use: