PKP Process Instruments, based in Hudson, Massachusetts, US, has introduced the model DS25 Flow Meter made of 316 stainless steel. Model DS25 is suitable for measuring and monitoring the flow of many liquids or gases. They are suitable for aggressive media and for use in food and drink applications. The DS25 works on the variable area principal and utilizes a float that is guided in a cylindrical measuring tube by means of a slotted nozzle. The flowing medium moves the float in the flow direction. An externally mounted pointer indicator magnetically coupled to the float indicates flow rate against a calibrated or arbitrary scale. The indicator assembly also houses optional alarm outputs, analog output and totalizer. The DS25 supplied with 316 stainless steel wetted parts that can be optionally PTFE coated for aggressive media applications. Available pipe sizes are 1/2, 3/4, 1, 1-1/4, 1 1/2, 2, 3, 4 and 6in with full scale ranges from 0.01GPM water to 440GPM water and 0.44SCFM air to 1100SCFM air. Pressure rating is typically 580 or 1450PSIG with higher-pressure ratings available. Options include analog and alarm outputs, explosion proof model, oxygen cleaning, steam jacketing for temperature control and temperature isolation of electronics for high temperature applications.