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BFS-30-N / BFS-30-O Viscosity-Compensated Oil Flow Switches


The Barksdale BFS-30 family monitors oils and compatible liquids with viscosities from 30 to 600 cSt. Viscosity compensation helps maintain switching performance in lubrication, hydraulic, cooling and pump systems.

Choose a low-cost L version, N or NE versions without indication, or O and OE versions with an optical display. The NE and OE versions provide enlarged switching ranges. Setpoints are continuously adjustable and the units may be mounted in any position.


Select & Configure Model
Base Model #Medium / ServiceSwitching RangeProcess ConnectionPressure LimitSwitch ContactsConfigure Part #
 
BFS-30-LOil; 30–600 cSt; low cost0.5–1.6, 0.8–3 or 2–7 L/minG1/2300 bar brass; 350 bar SSNO or SPDT
BFS-30-N / OOil; 30–600 cSt0.5–1.5 to 35–110 L/minG1250 bar brass; 300 bar SSNO or SPDT
BFS-30-NE / OEOil; enlarged range1–20 to 15–80 L/minG1250 bar brass; 300 bar SSNO or SPDT
Measuring Range:

L: 0.5–1.6 to 2–7 L/min. N/O: 0.5–1.5 to 35–110 L/min. NE/OE: 1–20 to 15–80 L/min.

Temperature Limit:

120 °C standard; 160 °C optional HT.

Switch Type:

Adjustable magnetic reed flow switch; NO or change-over contacts according to model.

Mounting Orientation:

Any mounting position; observe flow direction and installation instructions.

Pressure Limit:

L: 300 bar brass / 350 bar SS. N, NE, O, OE: 250 bar brass / 300 bar SS. N brass GL: 100 bar.

Accuracy:

±10% of full scale.

Body Material:

Brass or stainless steel; see datasheet for wetted components.

Enclosure Rating:

IP65 with DIN plug; IP67 with moulded cable, where specified.


The datasheet publishes order numbers in the 0713-xxx.X format; retain the manufacturer’s .X notation and specify the required switching range when inquiring. The order-number table distinguishes L, N, NE, O and OE versions, material and contact arrangement. Request confirmation of the final ordering code rather than substituting an unverified value for X.

G1 adapters to G3/4, G1/2 and G1/4 are listed separately in the datasheet. Liquids must be compatible with the selected wetted materials and have a viscosity of 30–600 cSt. ATEX versions are not available. A separate BFS-30 operating manual was not located in the manufacturer library; request installation instructions with your quotation. Confirm availability.


Mod Tronic Instruments Limited
1 Delta Park Blvd #12
Brampton, ON L6T 5G1
Phone: 905-457-6322 or 1-800-794-5883
Fax: 905-457-4716 or 1-800-830-7122
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