InterTech Development Co.’s MicroPulse is a solid-state means of producing small, short pulses of various gases for a higher accuracy alternative to mechanical syringes. The compact (145 by 52 by 35 mm) tool contains a miniature heat exchanger and precision temperature control that can be fitted into process control circuits without adding volume.
According to the company, MicroPulse delivers gases up to 1.75 scc/minute at standard temperature and pressure. The required flow during the pulse period is controlled automatically via an eight-bit digital interface by a process loop control or other external controller. The user can preset flow direction (inward or outward), volume-flow (cc/minute), or mass-flow (scc/minute) pulses over a wide pressure range. Overall accuracy and repeatability of 0.1% can be achieved over extended periods of fully automatic operation.
The technology includes no moving parts or pneumatic valves to stick or wear and no small gaps or orifices to get clogged; no compressed-air source is required; a flow pulse can be initiated automatically at any interval; and multiple flow values can be produced in quick succession. www.intertechdevelopment.com
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