... : 3.6mA Smart 4-20ma combustible gas leak detector with lcd display and alarm Technical features:1) 4-20mA, 3 wire connection ... value, low or high level alarm indication.7) Three-key operation for on-site configuration and maintenance. 8) PC programmable software for ... .; ±1%F.S. (On request)8) Display mode: Backlight LCD, LED9) LCD display type: 5-digit 7-segment main display 8-digit ...