Low-pass Bessel Filters (LPF-100B / LPF-202A)
These DC amplifier and signal conditioners are used to filter noise and boost signals to levels compatible with computers, chart recorders and tape recorders.
- Single Channel LPF-100B
- Dual Channel LPF-202A
- Useful with Epithelial and Oocyte Clamps
4-Pole low pass Bessel filters with DC Amplifier Gains from 1 to 100. The LPF 100B and LPF-202A Filter / DC Amplifier signal conditioners are used to filter noise and boost signals to levels compatible with computers, chart recorders and tape recorders. Built with analog circuitry, these instruments exhibit very low noise and excellent stability.
The 4-pole low-pass Bessel filter frequencies are selected in six steps from 100 Hz to 5 kHz, and gains are selectable from 1 -100 in seven steps, in a 1, 2, 5 sequence. The full 10 kHz bandwidth is also available. DC signals at the input can be nulled with the Input Offset control. If the gain is set too high for the signal being processed, an overload indicator will light.
Single and Dual Channel Models
The LPF-100B is a single channel bench top instrument and the LPF-202A is a dual-channel model packaged in a low profile rack mountable cabinet (hardware supplied). Both models have input shorting switches that are handy for quickly establishing a zero level at the input. The LPF-202A also has a digital meter for reading DC or average voltage levels. Both models are line powered and covered by a 2-year warranty.
|Input Impedance||1 MΩ|
|Input Offset||± 200 mV @ input|
|Gains||x1, x2, x5, x10, x20, x50, and x100|
|Noise (referred to input)||12 µV RMS DC-5 kHz, 20 µV RMS wideband|
|Max. Output||± 10 V|
|Bandwidth||10 kHz @ x100 gain|
|Filter||4-Pole Bessel low pass|
|-3 dB Frequencies||0.1, 0.2, 0.5, 1, 2 & 5 kHz|
|Digital Meter (LPF-202A)||Low Range: ± 1.999 V|
|High Range: ± 19.999V|
|Overload Indicator||Lights when output exceeds ±10 V|
|Power Requirements||100-130 VAC or 220-240 VAC, 50/60 Hz, 3 VA|
|Physical Size, (H x W x D)||LPF-100B:6.3 x 14 x 23 cm, shipping weight 2.3 kg|
|LPF-202A:4.4 x 43.2 x 20 cm, shipping weight 4.6 kg|
|Warranty||Two years, parts and labor|
|Warner Bilayer Workstation brochure (rev 060601).pdf||Warner Bilayer Workstation Brochure|