BA338E Intrinsically Safe Pulse Input, Externally Powered, Rate Totalizer, Panel Mounting. The BA338E is a third generation intrinsically safe rate totalizer that is compatible with the earlier BA338C, but has a much larger display, a linearizer and an isolated synchronous pulse output. The totalizer is easy to use and can be configured on-site to operate with flowmeters having a magnetic pick-off, switch contact, proximity detector, open collector or a voltage pulse output. A slide-in scale card simplifies identification and international intrinsic safety certification permits worldwide installation