InterTech has unveiled MicroPulse, claimed to be a high accuracy alternative to mechanical syringes for mineral and mining researchers and processors. MicroPulse offers a solid state means of producing short pulses of various gases. The compact (145 x 52 x 35 mm) MicroPulse contains a miniature heat exchanger and precision temperature control that can be fitted into process control circuits without adding volume. It delivers gases up to 1.75 scc/m at STP.
The required flow during the pulse period is automatically controlled via an 8-bit digital interface by a PLC or other external controller. The user can pre-set flow direction (inward or outward), volume-flow (cc/minute) or mass-flow (standard cc/minute) pulses over a wide pressure range. Overall accuracy and repeatability of 0.1% can be achieved over extended periods of fully automatic operation. According to the company, the advantages of MicroPulse technology include no moving parts or pneumatic valves to stick or wear, no small gaps or orifices to get clogged, no compressed air source is required, applications can initiate a flow pulse automatically at any interval, and multiple different flow values can be produced in quick succession, if required by the application.