An anhydrous ammonia distribution system includes a portable nurse tank 12 powered by an operator cab 13. One or more distributors 22 receive anhydrous ammonia from the nurse tank, and a plurality of knife hoses 30 deliver anhydrous ammonia from a distributor to a selected number of knives 31 for delivery to the field. Pressure gauge 32, 34 is provided for monitoring pressure at one or more distributors, and a camera 42 positioned within enclosure 40 transmits a reading from the pressure gauge to the operator cab, thereby alerting the operator to a malfunction in the delivery system.