Various design considerations and their implementation in an instrument, designed for measurement of electron parameters on-board Indian satellites SROSS-C2, along its orbital path are presented. The proposed instrument measures the electron density in the range 5 X 10~2 - 5 X 10~6 cm~(-3), electron temperatures from 500 K to 4000 K, and photoelectron flux of energy 3-30 eV of the order 10~8 cm~- s~(-1) with full-scale instrument sensitivity 0.2 percent. Experimental results obtained during testing and flight demonstrate the instrument performance.
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