Model 71774 Thermopile Detector Preamplifier
The 71774 is a low noise, low drift, battery operated preamplifier designed specifically for Thermopile Detectors. Use the 71774 to amplify the voltage from a thermopile detector to a level that can be measured and displayed by a standard voltmeter, or an A/D card in a computer. The 71774 has a fixed gain of 1000 amplifying the µV level signals of typical thermopiles to mV levels.
The 71774 has two bandwidths: DC to 2 Hz and DC to 100 Hz. Use the DC to 2 Hz output with slow thermopiles or very slowly varying signals, for the lowest noise performance. The DC to 100 Hz output should only be used for faster responding thermopiles and signals, since the additional bandwidth carries the penalty of higher noise levels and more susceptibility to AC mains frequency interference.
The 71774 has BNC input and output connectors. The 70028 Adapter converts the BNC connectors on the 71774 to female banana plugs, so you can use the preamplifier with your own detectors.