Pext-01
The PEXT-01 is designed for pressure ejection of drugs in physiological and pharmacological studies while recording extracellular signals.
It combines the popular PDES pressure ejectors with the extracellular amplifier EXT-02F/1 in one 19″ instrument that can easily be mounted in a rack.
Last Updated on May 27, 2021
Pressure ejection of substances can be performed with the same pipette as extracellular recording at the same position, or at a distant site using a separate pipette.
Specifications and options are the same for the ejection and recording part of the PEXT-01 as for the single channel instruments of the PDES and EXT-02F.
Features:
Last Updated on May 27, 2021
three position toggle switch, (TIMER, CONT., EXT.).
SOURCE GAS:
air, nitrogen, helium etc. no aggressive, combustible or explosive gases, filtered by a 5 µm filter element.
PRESSURE RANGE:
input pressure: max. 5 bar (1 bar = 100 kPa = 14.5 psi)
pressure control range: 0-4 bar, 0-58 psi; with microJECT 0-2 bar, 0-30 psi
display range: 0-4 bar, 0-58 psi
residual air pressure: 10 mbar (0.145 psi) – 100 mbar (1.45 psi).
INPUT AND OUTPUT COUPLINGS:
quick connect type.
DIGITAL TIMER:
100 µs – 9.9 s set by five digit tumble-wheel switch
(0000.1 – 9999.9 ms).
ANALOG TIMER:
0.1 – 1 s and 1 – 10 s with linear control, range set by toggle switch time base selector (0.1 s, 1 s).
MINIMUM PRESSURE PULSE LENGTH:
10 ms (digital timer), <1 ms with microJECT, 100 ms (analog timer).
PULSE OUTPUT:
Pressure Monitor: standard BNC connector, sensitivity: 1 V / bar or 0.1 V / psi, output impedance 249 Ω
Timing Monitor: standard BNC connector, TTL (LO = 0-1 V, HI = 5 V), output impedance 249 Ω.
PULSE INPUT:
standard BNC connector, TTL (LO = 0-2.5 V, HI = 2.5-12 V), input impedance 10 kΩ.
STATUS / EJECT TIME INDICATOR:
red/green LED
red light: channel has been turned on, valve is closed
green light: valve is open.
POWER REQUIREMENTS:
115/230 V AC, 20-40 W,
DIMENSIONS:
19″ rackmount cabinet, 19″ (483 mm), 10″ (250 mm), 3.5″ (88 mm)
REMOTE CONTROL (OPTION):
Toggle switch and status LED for each channel,
size: 25 x 40 x 100 mm.
Last Updated on May 27, 2021
Operating voltage ±12 V; Size (approx.): 65x25x25mm
holding bar diameter 9 mm, length 150 mm
Electrode connector: BNC with driven shield
Ground connector: 2.4 mm connector or headstage enclosure
Reference connector: gold-plated SMB, grounded shield
Input resistance: >1012 Ω
Differential input: cmr >90 dB at 1 kHz (tested with 0 Ω input resistance).
AC/DC OUTPUT:
filtered and amplified
impedance 50 Ω
DIFFERENTIAL INPUT:
BNC / SMB connector with headstage or BNC connectors
CMR >90 dB
GND position for each INPUT
INPUT RESISTANCE (without headstage):
10E+6 Ω , range ±1 V (lower input resistance on request)
LOW PASS FILTER:
30, 100, 500, 700, 900, 1.3k, 1.5k, 1.7k, 3k, 10k, 20k Hz
HIGH PASS FILTER:
OFF, 3, 30, 100, 300, 400, 500, 600, 800, 1k, 3k, 10k Hz
NOTCH FILTER (optional):
50 Hz or 60 Hz
AUDIO MONITOR:
PITCH or NOISE, DC or AC
NOISE mode with THRESHOLD
channel selected by switch
connector external speaker / line
GAIN:
10, 20, 50, 100, 200, 500, 1k, 2k, 5k, 10k
OFFSET COMPENSATION:
Potentiometer with 2 ranges: ±0.1 V or ±1 V
MONITORS:
Impedance: 250 Ohms
GAIN: BNC connector, 1 V per step, +1 V….+7 V
FILTER: BNC connector, 1 V per step, -8 V….+7 V
COMMAND: BNC connector, sensitivity: x10
ANALOG BALANCE MONITOR:
ca. ±30 mV
EXTERNAL POWER SUPPLY:
AC output; 12-18V, 1 A
DIMENSIONS:
245 x 200 x 90 mm
Last Updated on May 27, 2021
| Part No. | Description |
| PEXT-01D | PEXT System with Digital Timers, one Channel PDES w. Analog Manometer, EXT Amplifier w/o Headstage |
| PEXT-01D-LA | PEXT System with Digital Timers, one Channel PDES w. Digital Manometer, EXT Amplifier w/o Headstage |
| PEXT-01DE | PEXT System with Digital Timers, one Channel PDES w. Analog Manometer, requires external Valve, EXT Amplifier w/o Headstage |
| PEXT-01DE-LA | PEXT System with Digital Timers, one Channel PDES w. Digital Manometer, requires external Valve, EXT Amplifier w/o Headstage |
Last Updated on May 27, 2021
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