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The Danfoss FQS 061H4000 is a flow switch solution designed to offer high reliability and performance in industrial liquid flow applications. With its SPDT contact output, 1” R threaded connection and IP20 protection level, it is an ideal choice in HVAC, water treatment, glycol circuits and other liquid-carrying systems.
| Pipe Diameter | Cut-out Setting [l/min] | Cut-in Setting [l/min] |
|---|---|---|
| DN25 / 1” | 18 – 45 | 21 – 50 |
| DN32 / 1 1/4” | 43 – 100 | 46 – 102 |
| DN40 / 1 1/2” | 63 – 140 | 68 – 145 |
| DN50 / 2” | 50 – 250 | 58 – 255 |
| DN65 / 2 1/2” | 105 – 565 | 120 – 570 |
| DN80 / 3” | 100 – 850 | 115 – 880 |
| DN100 / 4” | 200 – 940 | 210 – 950 |
| DN125 / 5” | 350 – 1120 | 380 – 1140 |
| DN150 / 6” | 530 – 1700 | 570 – 1800 |
The FQS flow switch is suitable for use in the following systems:
The Danfoss FQS 061H4000 increases equipment safety and optimises system efficiency by providing continuous monitoring of liquid flows. With its long-lasting, maintenance-free construction, it is a preferred solution in professional projects.
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