We need to buy a flowmeter for measurement of sulfuric acid (H2SO4), concentration: 98%. Pressure: 50 psi. Flow rate: 2 GPM. Pipe Material: stainless steel, diameter: 1 in. Temperature: 150 F.

It is a local measurement only. The control is made manually by the operator so the flowmeter doesn't need to transmit any analog or digital signal.

 

Someone once told me that electromagnetic flowmeters used for acid should have tantalum probes. There's also a similar thread here that may help:

http://www.control.com/thread/1026246657

 

We build plants that use and produce H2SO4. A magmetic flowmeter with PTFE liner and Tantalum tantalum electrodes is what you need.

Roy

 

if you just need local display, there are rotameters that work, armored, etc.

for remoted signals magmeters are good, so are orifice plates in the larger sizes. The tantalum electrodes listed by one of the posters may work in your case, but there can be problems in some applications at off-normal process conditions where the corrosion rate is unacceptable. The other potential issue is that Tantalum forms an oxidized layer that keeps corrosion under control. This could be a problem at very low fluid velocities where the magmeter produces microvolt electrode levels. I've always used platinum tipped electrodes, in spite of the cost. In any case you need to work closely with your supplier.

 

You are try using Capillary Based Thermal Mass Flow Meter or Miniature Rotor Design Flow Meter out of anti corrosive material. There are several company including McMillan which has some great products on such applications.