MPPI-3 Pressure Injector

About the MPPI-3

The Milli-Pulse Pressure Injector, MPPI-3 produces gas pressure pulses to an injection pipette. The unit offers precise linear control of both pressure and pulse duration. Alternatively, an external source such as a signal generator can be used to control the pulse width and rate.

The MPPI-3 provides three methods to initiate the pressure pulse, in either Trigger or Gated mode:

  • Front panel pushbutton
  • External TTL input signal
  • Optional footswitch

Continuous output allows fine-tuning of the flow rate and clearing clogs from pipettes. Maximum input pressure is 100 psi (690 kPa). The output pressure is adjustable from 0 up to 100 psi. An internal gas filter increses for reliability and ease of maintenance.

The MPPI-3 has an input for an optional Back Pressure Unit (BPU). This option prevents any reverse flow in a pipette caused by capillary action after a pulse by providing an adjustable (0-15 psi or 0-100 kPa) back pressure.

The new MPPI-3 case allows stacking of multiple controllers. The compact size and low cost makes the MPPI-3 an ideal choice for your pressure injection needs.

More Info

MPPI-3 Specifications
Input Pressure Range 0 – 100 psi (0 – 600 kPa)
Output Pressure Range Regulated 0 to 100 psi (0 to 690 kPa) (Maximum output dependents upon input pressure)
Output Pulse Range Four user-settable ranges:
5 ms to 100 ms, 5 ms to 100 ms, 5 ms to 10 s, 5 ms to 60 s
Minimum duration limited by the pneumatic solenoid valve to approximately 5 s
Output Pulse Setting Via a front panel 10-turn calibrated dial
Output Pulse Accuracy 0.4% of full scale (crystal controlled)
Output Pulse Repeatability 0.4% of full scale (1% over the life of the valve)
Output Pressure Gauge Front panel analog gauge: 0 to 100 psi (0 to 690 kPa)
Valve Life Expectancy 100 million cycles
Modes of Operation Continuous flow, Timed Pulse Duration flow control, Gated flow control
Control Options Front panel pushbutton switch, external TTL input signal, footswitch or other type of manual switch
Output Sync Allows monitoring of the valve control and the daisy-chaining of multiple controllers, as well as synchronizing the injection pulse with micromanipulators and piezo cell penetrators
Gas Input and Back Pressure Fitting 1/8” (3.18 mm) Barbed hose fittings
Gas Output Fitting 1/16” (1.59 mm) Barbed hose fitting
Recommended Gas Nitrogen or clean dry compressed air(Internally-mounted input gas filter provided)
Power Requirements Power Module: 100 to 240 V AC, 50 to 60 Hz, 0.5 A (Direct Power Connection: 12 V DC, 1.5 A, 18 W)
Size 2.7” H x 8.2” W x 8.5” D (69 x 209 x 216 mm)
Weight 2.4 lb (1100 g)