Scitec Instruments Ltd. has launched a 4-W wire coil-wound broadband IR source mounted on a TO-5 header for laboratory or field use. At steady state, the coiled filament operates at ∼950 °C when powered with 4 W, and it can be pulsed up to 1 Hz with a higher power input. When operated at 1 Hz and 50% duty cycle with 7.1 W, the output is a well-defined saw tooth with ∼34% modulation depth. Emissivity is ∼0.75, expected lifetime is ∼25,000 h, and the active area measures 1.8 × 1.8 mm.

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