Profile: SRS, Inc. specializes in providing piping instrumentation for petrochemical, natural gas, pulp-paper and sugar industry. We provide new & remanufactured instrumentation and control valves. Our products include analog temperature transmitters, transducers, positioners, pressure transmitters, controllers, relief valves and control valves. The 1151 DR alphaline differential pressure transmitter will measure extremely low pressure differential in fractions of an inch and transmit a proportional electrical signal. It provides differential measurement for line pressures up 4500 psi and transmits a proportional electrical signal.