PEXT

Extracelluar Amplfiier and Drug Ejection

Description

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.

Details

imageThe 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.

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

  • 2 or 4 bar pneumatic output
  • Digital manometer with PRESSURE MONITOR
  • Digital timer (100 ìs to 9999.9 ms) for pressure ejection
  • Manual, internal timed or external (TTL) pneumatic operation
  • Differential amplifier INPUT with high impedance
  • INPUT with BNC connectors or small headstage
  • OFFSET control potentiometer with two ranges (±0.1V or ±1V)
  • LOWPASS filter: 30, 100, 300, 500, 700, 900, 1.3k, 1.5k, 1.7k, 3k, 10k, 20k Hz
  • HIGHPASS filter: OFF, 3, 30, 100, 300, 400, 500, 600, 800, 1k, 3k, 10k Hz
  • OUTPUT: DC or AC FILTERED x10 to x10k
  • Optional AUDIO monitor, noise mode with threshold or pitch mode
  • OVER LEDs (activating at 10% below maximum output)
  • Analog BALANCE monitor for optimal OFFSET control
  • Two separate holders for ejection and recording or one combined ejection/recording pipette holder

Ordering

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

Tech. Data PDES

MODE SELECTION: 
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 = 105 Pa = 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.

Tech. Data EXT

HEADSTAGES (optional):
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

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

Downloads

Manual:
PEXT-01 Manual

Brochure:
PEXT-01 Brochure