Hydrostatic Level Probe – Aplisens SGE-25 Smart And SGE-25S Smart Series

Features

  • Programmable zero shift, range and damping ratio
  •  4…20 mA output signal + HART protocol
  •  Accuracy 0.1%
  •  Integrated internal overvoltage protection circuit
  •  ATEX Intrinsic safety
  •  Special version with Titanium wetted parts ( SGE-25S.Smart)
  •  Marine certificate DNV
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Principles of operation, construction
The probe measures liquid levels, basing on a simple relationship between the height of the liquid column and the resulting hydrostatic pressure. The pressure measurement is carried out on the level of the separating diaphragm of the immersed probe and is related to atmospheric pressure through a capillary in the cable. The active sensing element is a piezoresistant silicon sensor separated from the medium by an isolating diaphragm. The electronic amplifier, which works in combination with the sensor, is additionally equipped with an overvoltage protection circuit, which protects the probe from damage caused by induced interference from atmospheric discharges or from associated heavy current engineering appliances.

Application
The SGE-25.Smart level probe is applicable to measure liquid levels in tanks, deep wells or piezometers.

Specification

Metrological parameters
Accuracy ≤ ±0,1% for nominal range
SGE-25.Smart ≤ ±0,3% for range 0…10% FSO
Long term stability ≤ 0,1% (FSO) for 2 years
Thermal error < ±0,08% (FSO) / 10°C
max ±0,2% in the whole compensation temp. range
Thermal compensation range -25…80°C
Response time 16…230ms (programmable)
Additional electronic damping 0…30s
Error due to supply voltage changes 0.002% (FSO) / V
Electrical parameters
Power supply 7.5…55 VDC (Ex 7,5…28 VDC)
Output signal 4…20 mA (two wire transmission)
Resistance required for communication >240 W
Operating conditions
Medium temperature range -30…40°C
ETFE or PTFE version: 0…80°C
Degree of protection IP68
Material of casing SS316L
Material of diaphragm Hastelloy C276
(optionally: SS316L)
Cable shield PU, ETFE, PTFE

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Aplisens SGE-25.Smart And SGE-25S Smart level probe-DpstarGroup

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