[en] Advances made at BNL in position sensing methods and in gas mixture studies have made possible the development of neutron position sensitive detectors with significantly improved position resolution, position accuracy and uniformity of response. A position resolution in the range of 1 to 1.5 mm (FWHM), an integral nonlinearity better than +- 0.1% and uniformity of response of +- 2 to 3% (peak-to-peak) are readily achieved independently of the detector size. These detectors operate at a moderate pressure (5 to 6 atm) with a ³He - C₃H₈ mixture at very low required avalanche gain (approx. 30) by virtue of the high precision centroid finding position readout