Water flow monitoring
The G1/2 flow sensor is a pass-through sensor that provides a pulse signal varying with the rate of water flow.
The PRT232 can be ordered with our G1/2 waterflow sensor to monitor measure flow of water. This requires installation of another connector on the PRT232, so as a result we do not offer the sensor separately; they must be ordered as a set. Cedar Lake Instruments does not charge for the hardware modification.
The sensor is not calibrated for a specific pulse rate, but can be used for coarse measurement of water flow. Our tests show that it provides approximately 120 pulses per gallon.
The G1/2 sensor has a ½" straight thread and easily connects to standard ½" NPT plumbing connectors. A ½" NPT hose barb adapter can be used to connect to plastic tubing.
G1/2 sensor specifications
The PRT232 can be ordered with our G1/2 waterflow sensor to monitor measure flow of water. This requires installation of another connector on the PRT232, so as a result we do not offer the sensor separately; they must be ordered as a set. Cedar Lake Instruments does not charge for the hardware modification.
The sensor is not calibrated for a specific pulse rate, but can be used for coarse measurement of water flow. Our tests show that it provides approximately 120 pulses per gallon.
The G1/2 sensor has a ½" straight thread and easily connects to standard ½" NPT plumbing connectors. A ½" NPT hose barb adapter can be used to connect to plastic tubing.
G1/2 sensor specifications
Water temperature: < 120° C Flow rate: 0.25 - 8 gallons per minute (1-30 Lpm) Pressure: 174 psi (1.2MPa) maximum
Connecting digital inputs
The PRT232 can accept digital connections or switch contacts at J1 and J4. Connecting switches is simple: just wire the
switch contacts directly to the pins.
Connecting to a digital electronic device is almost as easy, but you must take care to observe the correct polarity of inputs. In the diagram above, the "-" terminals are digital Ground and the "+" terminals are the output signal.
J1 uses an internal 820 ohm pullup resistor and is designed to accept open-collector outputs.
Connecting to a digital electronic device is almost as easy, but you must take care to observe the correct polarity of inputs. In the diagram above, the "-" terminals are digital Ground and the "+" terminals are the output signal.
J1 uses an internal 820 ohm pullup resistor and is designed to accept open-collector outputs.
An open-collector is used when the signal may have to travel a long distance. It gives the system designer the option of using more current to determine the HIGH or LOW (ON/OFF) state of the line and makes for a cleaner, more noise free connection.
Controlled fluid dispense techniques
One of the common applications of the PRT232 is controlling the measurement and dispense of fluids. Here are a few methods that are used to precisely dispense a known volume of fluid.
Timed dispense
Timed dispense
Manuals and other documentation
Sample software
Executable and C++ source to communicate with PRT232 counters
consolePrt232.zip