Proteus 200 Series Analog Output Flow Switch
Proteus specialize in measuring liquid flow in cooling systems.
Our products range from flow switches which send an alarm
when flow is too high or low, to integrated flow rate,
temperature and pressure measurement systems.
We offer a variety of electronic interfaces extending from a
relay closure to frequency, voltage and current loop outputs
as well as DeviceNetTM and LonWorksTM.

Magnetic Reed Switch - by Dickson (model a119)
Product Details
Shipping Weight: 2.00 pounds
Product Description
Reed switch and magnet assembly, N.O./N.C. Main body of switch and magnet is 1-3/4" L x 1/2" H x 1/2" W. Ears are approx. 3/8". Switching distance is approximately 1/2".
The 1/10" thick plexiglas platform is mounted to a very rigid aluminum "L" channel on both sides and the "L" channels are solidly mounted to the keyboard case with 1/4" bolts. I used some fairly stiff compression springs between the "L" channel and the case to help me get the platform to optimum height above the key mounted magnets. The magnets are firmly stuck to the keys with Scotch brand double stick foam tape.