Variable Area Flowmeter (VAF) with One or Two Switching Points
NCL and NCH switch types
NCH stands for "normally closed high" - when the top of the orange internal float is above the switch, the contacts will be closed.
NCL stands for "normally closed low" - when the top of the orange internal float is lower than the switch, the contacts are closed.
Most alarm systems operate on a "normally closed" basis - so when the alarm condition occurs, the contacts open, triggering the alarm. This acts as a fail safe in case the cable is damaged or broken as, detecting a break in the system, the alarm will activate.
If you require a different switching combination, please call us.
Part Number: 7260-P
25-250 lph. Plain union PVC ends
Switch 1 - NCH switch - open contacts on low flow, closed on high
Switch 2 - NCL switch - closed contacts on low flow, open on high
Rated voltage: Max DC24/AC24. Rated amperage: Max 0.3A.
£108.01 (£129.61 inc VAT)
Part Number: 7261-P
100-1000 lph. Plain union PVC ends
Switch 1 - NCH switch - open contacts on low flow, closed on high
Switch 2 - NCL switch - closed contacts on low flow, open on high
Rated voltage: Max DC24/AC24. Rated amperage: Max 0.3A.
£108.01 (£129.61 inc VAT)
Part Number: 7262-P
250-2500 lph. Plain union PVC ends
Switch 1 - NCH switch - open contacts on low flow, closed on high
Switch 2 - NCL switch - closed contacts on low flow, open on high
Rated voltage: Max DC24/AC24. Rated amperage: Max 0.3A.
£107.00 (£128.40 inc VAT)
Part Number: 7263-P
0.6-6m3/h. Plain union PVC ends
Switch 1 - NCH switch - open contacts on low flow, closed on high
Switch 2 - NCL switch - closed contacts on low flow, open on high
Rated voltage: Max DC24/AC24. Rated amperage: Max 0.3A.
£125.14 (£150.17 inc VAT)
Part Number: 7264-P
1.6-16 m3/h. Plain union PVC ends
Switch 1 - NCH switch - open contacts on low flow, closed on high
Switch 2 - NCL switch - closed contacts on low flow, open on high
Rated voltage: Max DC24/AC24. Rated amperage: Max 0.3A.
£166.24 (£199.49 inc VAT)
Part Number: 7265-P
8-40 m3/h. Plain union PVC ends
Switch 1 - NCH switch - open contacts on low flow, closed on high
Switch 2 - NCL switch - closed contacts on low flow, open on high
Rated voltage: Max DC24/AC24. Rated amperage: Max 0.3A.
£343.97 (£412.76 inc VAT)
Part Number: 7266-P
12-60 m3/h. Plain union PVC ends
Switch 1 - NCH switch - open contacts on low flow, closed on high
Switch 2 - NCL switch - closed contacts on low flow, open on high
Rated voltage: Max DC24/AC24. Rated amperage: Max 0.3A.
£510.55 (£612.66 inc VAT)