Gas/liquid Flow Sensors With 0 to 5 Vdc Output

FLR1000 Series flow sensors can measure extremely low flow rates from 20 mL/min to 500 L/min. These sensors are suitable for a wide variety of industrial, commercial, and laboratory flow applications. Not for use with Hydrogen or Helium. FLR1000 Series flow sensors operate on 12 Vdc power and are designed for incorporation into data acquisition systems that supply 12.5 Vdc to sensors and receive 0 to 5 Vdc linear signals in return. Because of their cost effectiveness, FLR1000 Series units may replace conventional glass tube and ball flow meters in applications in which an electrical signal proportional to flow rate is desired.

The FLR1000 Series uses a Pelton-type turbine wheel to determine the flow rate of the gas. The rotation rate of the turbine wheel is linear over a wide dynamic range. The electro-optical system consists of a diode emitting energy in the infrared spectrum. Light energy is alternatively reflected and absorbed from "spokes" deposited on the small turbine wheel. This reflected light energy is detected by a photodiode. Thus, as the turbine wheel rotates in response to gas flow rate, electrical pulses are generated. Processing circuitry provides a DC voltage output proportional to the flow rate. For example, output signal is 1.0 Vdc at 20% of rated flow, 2.5 Vdc at 50% of rated flow, 4.0 Vdc at 80% of rated flow, and 5.0 Vdc at 100% of rated flow. Sensors can handle 20% above their rated flow without being damaged.

SPECIFICATIONS
FLR1000 Series
Accuracy: ±3% FS
Display: 3½-digit LCD, 22 mm (7/8") H
Output Signal: 0 to 5 Vdc, adjustable ±20% (typical)
Power Requirement: 11.5 to 15 Vdc regulated, 30 mA (typical)
Standard Sensor Material: 40% glass filled polyphenelene sulfide, glass window, stainless steel bearing support; sapphire shaft and bearing; FKM rubber O-rings standard
Pressure Rating: 40 psi at 20°C (68°F) for gas, 100 psi for liquid, 500 psi for brass units using liquid services
Temperature Rating: 0 to 50°C (32 to 122°F)
Temperature Sensitivity: ±0.2%/°C
Linearity: ±3% FS
Repeatability: ±0.5% FS from 50 to 100% of rated max flow for gas; ±0.2% FS for liquid
Cable Assembly: 0.9 m (3') cable length
Dimensions:
Display: 76 x 44 x 89 mm (3 x 1.75 x 3.5")
Non-Display: 60 x 42 x 37 mm (2.35 x 1.65 x 1.25")
Pressure Sensitivity: ±0.07%/mm Hg (using air at 1 to 3 atm)
Mounting: Holes for #4 screw provided

   Voltage Output Models: 11.5 to 12.5 Vdc (0.4 W @ 12 Vdc)
   Current Output Models: 18 to 24 Vdc (1.2 W @ 24 Vdc), 50 mA

Gas Flow Models - PPS Construction
Model No. No Display	Model No. with Display	Flow Range	Max Pressure Drop	Acetal Tube Fitting
FLR1001	FLR1001-D	20 to 100 mL/min	20 Inches Water	1/8"
FLR1002	FLR1002-D	40 to 200 mL/min	8 Inches Water	1/8"
FLR1003	FLR1003-D	100 to 500 mL/min	2 Inches Water	1/8"
FLR1004	FLR1004-D	200 to 1000 mL/min	2 Inches Water	1/8"
FLR1005	FLR1005-D	0.4 to 2 L/min	2 Inches Water	1/4"
FLR1006	FLR1006-D	1.0 to 5 L/min	2 Inches Water	1/4"
FLR1201	FLR1201-D	2.0 to 10 L/min	3 Inches Water	1/4"
FLR1202	FLR1202-D	4.0 to 20 L/min	3 Inches Water	3/8"
FLR1203	FLR1203-D	10 to 50 L/min	3 Inches Water	3/8"
FLR1204	FLR1204-D	20 to 100 L/min	3 Inches Water	1/2"
FLR1205	FLR1205-D	40 to 200 L/min	5 Inches Water	1/2"
FLR1206	FLR1206-D	100 to 500 L/min	20 Inches Water	1/2"

Liquid Flow Models - PPS Construction
Model No. No Display	Model No. with Display	Flow Range	Max Pressure Drop	Acetal Tube Fitting
FLR1007	FLR1007-D	13 to 100 mL/min	10 psi	1/8"
FLR1008	FLR1008-D	20 to 200 mL/min	10 psi	1/4"
FLR1009	FLR1009-D	50 to 500 mL/min	10 psi	1/4"
FLR1010	FLR1010-D	100 to 1000 mL/min	6 psi	1/4"
FLR1011	FLR1011-D	0.2 to 2 L/min	6 psi	1/4"
FLR1012	FLR1012-D	0.5 to 5 L/min	6 psi	3/8"
FLR1013	FLR1013-D	1.0 to 10 L/min	10 psi	3/8"