DWYER FMS系列流量开关

适用于水或油，输出：PNP常开或PNP常闭

产品介绍：

Series FMS Flow Sensor FMS-1 is for applications requiring RELATIVE measurement and set-point of flow rate. This means that the actual velocity of the flow or the quantitative measurement in GPM is not known and is not important. What is important is that the set-point can be set as a "percentage of" or "relative to" the full flow rate. No other flow sensor could do it this simply or effectively.

原理：
The model FMS uses a set of flashing LED's to indicate flow. All 7 of the LED's will remain lit to show 99% flow rate. The flow OK light will also be lit showing that the established full flow rate is what is flowing in the pipe. When you initially set the flow rate, it will mark that as your 99% mark. If your flow reduces below the 50% mark, you will get an alarm from the sensor.

If flow increases beyond the initially established flow rate, the "Overflow" LED light will come on. It is then the operator's decisions as to whether to ignore it if too much flow is not a problem and may actually choose this flow rate to be the new "normal" flow rate. This can be done by just depressing the "set" button until all LED's flash. The FMS has now recalibrated itself to the new flow rate. The "Flow ok" LED will again light and the set-point will automatically be re-set at the 50% of flow point.

技术参数：

介质：Water and water based liquids/oil and oil-based liquids.

材质： Sensor Head: 303 SS.

低流量设定： Auto set @ 50% / Adjustable via "set" push button.

设定范围： 5.0 ft/sec (0-150 cm/sec.)

重复性： < 0.5%.

滞后： 10% of set-point value typical.

介质温度： -4 to 176°F (-20 to 80°C.)

压力： 450 psi (30 bar).

响应时间： 25 seconds (typical).

电源： 20-30 VDC (short circuit protected).

电流： < 200 mA.

功耗： 6 W max.

电气连接： M12 male socket 4pin. Comes with 6.5 ft (2 m) cable with M12 connector and pigtail.

过程连接： 1/2" male NPT.

封装： IP 65 (NEMA 4).

初始操作： After 15 seconds.

输出： PNP N.O. (switch closed with flow), PNP N.C. (switch open with flow).

重量： .55 lb (.25 kg).