Analog comparator

Does anyone know where I can find an off the shelf solid state analog comparator board/module? It would compare a setpoint signal to a transducer input signal, 4-20mA, & output a 12/24 vdc digital signal when the transducer input exceeds the setpoint. This in turn is connected to a PLC high speed counter module. The application is response time testing of a solenoid valve shifting. It has to be high speed, < 1ms response time.

can you provide some more detail?
wouldn't comparator give you only one pulse every time?
why is this analog anyway? are you reading pressure?

You might be in roll your own territory. I didn't do an exhaustive search but the few places I looked all had 100msec response or similar. You may be hard pressed to get an off-the-shelf solution with the speed you are looking for.

Keith

An LM319 comparator doesn't *need* anything other than a 5v supply, < 1us response time.

Originally posted by imn:

Does anyone know where I can find an off the shelf solid state analog comparator board/module?

Click to expand...

The LM319 fits the off-the-shelf solid state part of the request but falls a little short on the board/module requirement.

If I were faced with a similar challenge I would build up my own with a comparator like theDave2 is suggesting. It may not be an off the shelf module but it will certainly get the job done.

Keith