The 1902 amplifier is no longer available for sale, please contact us for alternatives.
IMPORTANT NOTE: We are unable to offer the 1902 for sale in the EU due to new RoHS waste disposal legislation. This in no way compromises the safety specifications of the 1902.
The 1902 is research equipment and is not sold as a medical device within the meaning of the European Medical Devices Directive.
The 1902 amplifier is controlled by a serial line at 9600 Baud. It may be specified for general purpose transducer use, or with medical-specification isolation. This single-channel unit may also be ordered as stacks of 2 or 4 units with internal power and serial data connections, normally up to a maximum of 8 channels or 32 using special cabling, see below. The isolated 1902 is designed to meet BS 5724 (EN 60601-1). More details
The standard isolated input module is a low-noise stage, suitable for 3-electrode EEG or EMG signals. ECG signals can also be recorded using either the standard input or the optional lead-switching input module.
The low noise input has a unity-gain buffer option for common-reference applications, to reduce the effect of signal output impedance on the common mode rejection. There is also an input clamp option for fast-response studies involving magnetic or somatosensory stimuli.
All 1902s are currently being shipped in rack mount cases because of a power supply problem.
|Input clamp (per channel)
Multiple rack-mounted quad-channel 1902 units can be controlled by a serial buffer board
4 channel battery powered head stage for use with both concentric and wire needle electrodes
2 channel battery powered head stage
The 1902-10-HS2 and HS4 are now offered with 1.5mm touch-proof connectors as standard.
16 channel electrode adaptor box, 1.5mm safety sockets, including input buffer terminals
8 channel electrode adaptor box, 1.5mm safety sockets, including input buffer terminals
4 channel electrode adaptor box
2 channel electrode adaptor box
Flight case for Quad-channel rack-mounted 1902
The 1902-11 electrode adaptor boxes are designed to receive 1.5mm electrode plugs in safety (touchproof) sockets and to connect them by a 1.2m screened cable to the standard 1902 isolated input connector. Sockets for connecting 2mm electrode plugs can be made available on request.
Versions for 2, 8 or 16 channels are also available.
Where multiple channels share a common reference line, channel 0 of the 1902s should have an input buffer to reduce the common electrode capacitance loading.
The 1902-11-4 may be ordered with a switch, to select for all four channels, whether the signal is to be treated as bipolar, or for all four channels to have a common negative electrode.
The CED 4002-8 and CED 4002-16 are passive electrode adaptor boxes to adapt 8 and 16 electrodes to CED1902 isolated inputs. The electrode adaptor boxes are supplied with 1.5mm touchproof electrode input terminals as standard. Sockets for connecting 2mm electrode plugs can be made available on request. The outputs are taken via 1200mm captive screened cables that are fitted with 6-pin DIN connectors to mate with the isolated input connectors on a set of CED1902s. Other cable lengths are available to special order.
Each channel arrives on three leads: positive, negative and the common reference. Switches on the adaptor box allow the negative input of each channel to be connected to either its own input connector or to the output of the buffer. There is a separate switch that connects a channel’s common input line to either its own input socket or to the global common input connector. When both switches of a channel are in the local position, that channel is isolated from all other channels.
The boxes are metal, to give screening for the electrode signals. They are connected to the screens of the output cables, and should not be connected to mains earth.
|193 x 105 x 159 mm (W x H x D)
|352 x 100 x 180
Registered in England: 00972132
VAT: GB 214 2617 96
Producer registration number: WEE/BD0050TZ
For our US customers, we can provide tax form W-8BEN, that identifies us as a UK company.