Float Level Gauge

 Description The 3304 Liquefied gas marine liquid level gauge is a rugged mechanical system of accurately and continuously measuring liquid levels in the refrigerated tanks of liquefied gas carriers. The gauge can operate in tanks, up to 54mtr deep, and at temperatures as low as -200°C. The gauge is entirely mechanical in operation and does not require any power to provide a constant local readout. The main components are float, invar or stainless steel measuring tape, counter mechanism, tape storage drum, and a negator spring. The gauge is float actuated, and employs a “Tensator “spring as a counterbalancing mechanism which maintains a constant tape tension at the float so that float immersion is not affected by the length/weight of the tape throughout the measuring range. The accurately perforated tape transmits float movement to the sprocket wheel, which drives a counter mechanism providing a local digital readout, visible through a window in the counter housing. The sprocket wheel drive to the counter mechanism is transmitted via a magnetic coupling across a solid barrier flange, which completely isolates the counter chamber from the tank atmosphere. Advantages - Float lock-up mechanism- Suitable for closed loading conditions- Suitable for refrigerated tanks to -200°C- Suitable for chemical service- Magnetic float recovery with tank in service- No power required- Optional remote reading  (With 1319 or 2047T transmitter fitted, see DS/1319, DS/2047T)- Installed on more than 100 large LNGC 135,000m3 plus world wide- Approvals: LRS, DNV, GL, NKK, ABS, BV, RIN, KRS, SRS  Technical Data - Range: 0 ~ 54m Materials:- Accuracy: ± 7.5mm (LNG)  - Gaugehead body: Cast SS to BS3100-316S18  ± 5mm (chemical)               - Gaugehead cover: SS to BS970-316S16- Repeatability: ± 4mm- Gaugehead internals float/tape: SS to BS970- Operating Press: 3.5 kg/cm2 (50 PSI) 316S16- Operating Temp: -200°C ~ ambient- The model 3304 gauge fully complies with the requirements of the DTI, USCG & other international regulatory authorities