Page 73 - Schroeder - Accessories

Electronic Flow Rate Transmitter

The HFT 2100 series of flow transmitters is based on the variable area float principle. Irrespective of the HFT-2100 Air Breathers
installation position, the test medium deflects a spring-loaded float in the direction of flow, depending on the
flow rate. A Hall sensor which detects the position of the float, is fitted to the outside of the instrument and Suction
is therefore separate to the flow circuit. In proportion to the deflection of the float, the sensor produces an
analogue signal which corresponds to the particular measuring range. Separators
and
The device is calibrated for vertical installation and for an upwards flow direction. The transmitter is designed to Strainers
give reliable measurements within its accuracy range, even with changes in viscosity. The kinematic viscosity may
vary between 30 and 600 cSt (141-2727 SUS).
Oil Sight
The areas of application include: Glasses
- Central lubrication systems - Cooling systems and circuits - Chemical industry
- Oil circuit lubrication systems - Lubrication circuits - Research & development
- Transformers - Hydraulic systems Electronic
- Pumps - Welding machines and laser systems Sensors

Fluid Level
Features and Benefits Indicators
■ Accuracy ≤ ± 10 % FS ■ High level of functional reliability
■ Viscosity compensation from 30..600 cSt (141- ■ High pressure resistance
2727 SUS) ■ Threaded connection
■ Any mounting position

Input Data Specifications
Measuring Ranges: Size 1: Size 2:
0.13 - 0.42 gpm (0.5 - 1.6 L/min) 0.13 - 0.39 gpm (0.5 - 1.5 L/min)
0.21 - 0.79 gpm (0.8 - 3.0 L/min) 0.26 - 1.05 gpm (1 - 4 L/min)
0.53 - 1.85 gpm (2.0 - 7.0 L/min) 0.53 - 2.11 gpm (2 - 8 L/min)
0.79 - 2.64 gpm (3 - 10 L/min)
1.32 - 3.96 gpm (5 - 15 L/min)
2.11 - 6.34 gpm (8 - 24 L/min)
2.64 - 7.92 gpm 10 - 30 L/min)
3.96 - 11.88 gpm (15 - 45 L/min)
5.28 - 15.85 gpm (20 - 60 L/min)
7.92 - 23.77 gpm (30 - 90 L/min)
9.24 - 29.05 gpm (35 - 110 L/min)
Operating Pressure:
Brass Version 4351 psi (300 bar) 3625 psi (250 bar)
Stainless Steel Version 5076 psi (350 bar) 4351 psi (300 bar)
Pressure Drop: 0.3 - 3 psi (0.02-0.2 bar) 5076 psi (350 bar)
Mechanical Connection: See dimensions
Parts in Contact with Medium:
Brass Version Stainless Steel 1.4571; FPM 1 ; Brass, Nickel-plate; Brass; Hard Ferrite
Stainless Steel Version Stainless Steel 1.4571; FPM 1 ’ Hard Ferrite
Output Data
Output Signal: 4 .. 20 mA, 3 Conductor
0 .. 10 V, 3 Conductor
Accuracy 2 : ≤ ± 10% FS
Repeatability: 1% FS max.
Environmental Conditions
Operating Temperature Range: -4°F to 158°F (-20°C to 70 °C)
Fluid Temperature Range: -4°F to 158°F (-20°C to 70 °C)
Viscosity Range: 30 .. 600 cSt (141 - 2727 SUS)
Mark: Directive 2004 / 108 / EC
Protection class to IEC 60529: IP 67
Other Data
Supply Voltage: 18 .. 30 V
Power Consumption: < 1 W Notes:
Electrical Connection: Male Connection M12x1 1) Other seal materials
Housing Material: available upon request
Measuring Body Brass (nickel-plated) or st. steel 1.4571 2) 3% possible with
calibration to a certain
Transmitter Brass (nickel-plated) viscosity
SCHROEDER INDUSTRIES 71