** Shares of laboratory instrument manufacturer XRF Scientific XRF.AX rise 4.1% to A$1.885, their highest level since February 19
** Company reports a 10.7% rise in March-quarter profit before tax to A$3.7 million ($2.64 million), and its revenue rises 13.8% to A$15.8 million
** Shares on track for best day in one week, if gains hold
** Stock down 8.5% YTD including current moves
($1 = 1.4037 Australian dollars)
(Reporting by Jasmeen Ara Shaikh in Bengaluru)
((Jasmeenaraislam.Shaikh@thomsonreuters.com;))