npi PDES units are designed for pressure ejection of drugs in physiological and pharmacological studies. PDES systems can be equipped with high pressure outputs (up to Pmax = 4 bar / 87 psi) for drug application with fine-tipped micropipettes or with low-range pressure output (Pmax = 0.7 bar / 10 psi) for controlled droplet application from large-tipped pipettes. Analog (standard) or digital timers (optional) and a remote-control unit facilitate the use of these instruments.
The PDES 02D is the standard system. Each system is housed in a 19" cabinet that can be mounted in a rack. It is comprised of two channels. Each channel consists of a precision pressure regulator, an analog (or digital) pressure display, a digital (or analog) timer, electronically controlled valves, control electronics and a regulated power supply. Ejection of drugs can be activated manually or via a TTL input. The operational status is indicated by a red/green LED. Each channel is equipped with an "EXHAUST" coupling whereby a low "retain" pressure can be applied (analogous to the "retaining" current used in iontophoretic systems).