F61TB-9100 Johnson Controls Flow Switch
The Johnson Controls F61TB-9100 is a pipe-insert style liquid flow switch designed for monitoring fluid flow in water, ethylene glycol, or seawater systems. It features a stainless steel paddle(s), durable IP67 vapour-proof enclosure, and SPDT snap-acting electrical contact.
Johnson Controls F61TB-9100 Pipe-Insert Liquid Flow Switch (IP67, Stainless Steel Paddles)
Overview
The Johnson Controls F61TB-9100 is a pipe-insert style liquid flow switch designed for monitoring fluid flow in water, ethylene glycol, or seawater systems. It features a stainless steel paddle(s), durable IP67 vapour-proof enclosure, and SPDT snap-acting electrical contact. The switch supports a broad flow range (≈ 0.15 to 46 dm³/s), making it suitable for many pipe sizes with paddles available from 1″ to 6″. Ideal for flow proving, pump protection, or system alarm/controls.
Key Features & Benefits
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Pipe-insert design with stainless steel paddles (AISI 301) for durable, corrosion-resistant operation.
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IP67 vapour-proof enclosure for reliable outdoor or harsh environment installation.
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Wide flow range: ~ 0.15 to 46 dm³/s with paddles from 1″ to 6″, adjustable via paddle size and trim.
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SPDT snap-acting switching to signal flow increase or drop-off.
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Works with multiple liquid types: water, glycol, seawater.
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Large wiring space and accessible range screw for field adjustment.
Technical Specifications
| Specification | Detail |
|---|---|
| Brand / Series | Johnson Controls / Penn Controls F61-Series |
| Model / Part Number | F61TB-9100 |
| Type | Pipe-Insert Liquid Flow Switch |
| Enclosure Rating | IP67 (vapour proof) |
| Contact Type | SPDT snap-acting switch |
| Paddle Sizes Available | 1″, 2″, 3″, 6″ stainless steel paddles (trim to fit) |
| Flow Range | ~ 0.15 – 46 dm³/s (varies with paddle size) |
| Liquids Compatible | Water, ethylene glycol, seawater |
| Minimum Liquid Temp | −30 °C for IP67 models |
| Maximum Liquid Temp | +120 °C (at ~20 °C ambient) |
| Ambient Temperature Range | −40 °C to +55 °C depending on model |
| Electrical Rating | 15 A (8 A inductive) at 230 VAC (typical) |
| Wiring Connections | Screw terminals, suitable cable entry (PG-16 nipple for IP67 types) |
Applications
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Flow detection for chiller water or condenser water loops to protect pumps and compressors.
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Monitoring flow in process systems using glycol or seawater.
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Alarming or interlocking in control systems when flow drops below safe thresholds.
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Outdoor or wet environments where a vapour-proof switch (IP67) is needed.
Installation & Best Practices
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Mount the switch so the paddle is fully inside flow, not touching pipe walls or obstructions
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Ensure arrow on switch body points in direction of fluid flow.
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Maintain straight pipe runs (10× pipe diameter) upstream/downstream when possible to reduce turbulence.
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Trim large paddles if used, to match pipe diameter per model instructions.
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Seal cable entry properly to maintain IP67 rating; use the provided PG-16 nipple.
Why Buy From Apex Controls
You get the genuine Johnson Controls F61TB-9100 switch, OEM spec, verified paddle sizes, and warranty support. Apex Controls ensures proper product fit, technical advice, and fast shipping so your system flow monitoring remains reliable.
| Weight | 2 lbs |
|---|---|
| Dimensions | 7 × 8 × 4 in |
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