The FTB300 Series of digital paddle wheels
are an economical choice for low flow rate
applications. They use Infra-red light beam
technology. Available connections include
1/8 FNPT, 1/4 FNPT and 3/8" OD tube fittings. Six
available flow ranges as low as 30ml/min to
7000 ml/min. No display models have a 5 Vdc current
sinking pulse output. Units with displays have a 6-digit
LCD, with up to 4 decimal positions that display both
flow rate and total. All units include an open collector
User selectable scale factors include: flow units,
gallons, liters, ounces, and milliliters. Time units
include: minutes, hours, days. Users can also
program custom units. Programming values and total
are stored in the non-volitile memory. The total reset
function can also be disabled. Standard units have a
clear PVC viewing lens, PVDF chemical resistant lens
are available as an option. The enclosure is a weather
resistant Valox PBT and rated NEMA 4X (IP56).
SPECIFICATIONS Max Working Pressure: PVC Lens: 9 bar (130 psig) at 21°C (70°F) PVDF Lens ("-PVDF" Option): 150 psig (10 bar) @ 21°C (70°F) Max Fluid Temperature: PVC Lens, FNPT Connectors: 54°C (130°F) at 0 PSI
PVDF Lens ("-PVDF" Option), Tubing Connectors: 93°C (200°F) at 0 PSI Full Scale Accuracy: ±6% Input Power Requirement: 9 to 28 Vdc Sensor Type: Infrared light beam Alarm Output: Open collector 30 Vdc max Enclosure: NEMA 4X (IP56) Approximate Shipping Wt: 0.45 kg (1 lb) Materials of Construction Body, Paddle, Axle Material: PVDF Connector Material FNPT Connections: PVC Tubing Connectors: PVDF Viewing Lens Material Option Clear See Through: PVC Opaque Chemical Resistant: PVDF (optional) O-Ring Seals: FKM (EPDM optional) Compression Seal to Pump: PVC Sensor Only Models: 5 Vdc digital square wave (2-wire) Output: 3-wire shielded cable, 1.8 m (6')
Model with Display
Model without Display
3/8" OD Tube
3/8" OD Tube
0.03 to 0.3
0.48 to 4.7
0.1 to 1
1.6 to 15.8
0.2 to 2
3.2 to 31.7
0.3 to 3
4.8 to 48
0.5 to 5
7.9 to 79
0.7 to 7
11.1 to 111
† All amounts shown in USD Note: Comes complete with operator’s manual.
LCD displays are not recommended for direct sunlight.
For EPDM O-rings, add suffix "-EPDM" to model number, no additional cost.
For European style power supply (220V50Hz) add suffix, "-EU" to the model number; add $25 to price.
For US 230V 60Hz power supply, add suffix "-230V" to model number; add $45 to price.
NIST certificate not available.
Part Number Builder
Build Your Part Number Below
Fitting Size select from: 1 for 1/8 FNPT 2 for 1/4 FNPT 3 for 3/8" OD Tube
Range select from: 1 for 0.03 to 0.3 lpm (0.48 to 4.7 gph) 2 for 0.1 to 1 lpm (1.6 to 15.8 gph) 3 for 0.2 to 2 lpm (3.2 to 31.7 gph) 4 for 0.3 to 3 lpm (4.8 to 48 gph) 5 for 0.5 to 5 lpm (7.9 to 79 gph) 6 for 0.7 to 7 lpm (11.1 to 111 gph)
Note: All combinations may not be valid, check spec sheet for valid part numbers.
Rated 5 out of
Great little flow meterWe purchased this flow meter for a test project and we really loved the ease of use and accuracy. Would definitely recommend this product to others.