User Manual

FLUID COMPONENTS INTL CHAPTER 1 - GENERAL INFORMATION
Model FR78B Flow Switch/Monitor
1 - 2
Doc. No. 06EN003281 Rev. -
Sensing/Flow Element Ranges
Water: 0.08 to 2.25 cc/sec
Oil: 0.05 to 25 cc/sec
Air: 4.0 to 1500cc/sec
Adjustable Response Time
1 to 150 seconds
Process Connection
1/4 inch x 2 inch (6.4 x 50mm) long tubing,
.0028 (7mm) wall thickness, .53 inches (13.5mm)
total length. 3/8 inch (9.5mm) and 1/2 inch
(12.7mm) tubing available
In-line Sensor Assembly Body Length
5.3 inches (1.35mm); Customer specified body
lengths available
Enclosure Classification
Standard: No enclosure; Optional control circuit
enclosure is Feralloy epoxy coated and resists the
effects of weather and corrosion. NEMA and CSA
Type 4 (meets IP66)
Sensing/Flow Element
Operating Conditions
Temperature: -100 to 350°F (-73 to 176°C)
Pressure: To 1000 psig [69 bar (g)]
Repeatability: 1% of full scale range at constant
process conditions
Input Power
115 ±15 or 230 ±30 Vac 50/60 Hz; or 22 to 30 Vdc,
6 Watts
Relay Contacts
DPTD, rating is 2 amps at 115 Vac and 24 Vdc or
1 amp at 230 Vac. Coil de-energized at no-flow
(default) or de-energized at flow (field selectable)
Material of Construction
All wetted surfaces are 316 series stainless steel with
nickel braze per process specifications AMS 4777.
Optional wetted surface material customer specified
Specifications