... medichine, metallurgy industry. food&beverage; oven; furnance, plastic extruder heating process etc.,for processing parameter display,such as temperature, level,flow. ... time,either forward or backward control. For example, 4-20mA output for analog output or proportion control. Digital outpt ... 4 configurable controls:relay,SSR,8 alarm modes for your option(such as high/low/deviation/interval/breakage ...