Profile: DL Instruments designs, manufactures, sells, and services a range of electronic instrumentation for industrial, commercial, and laboratory use. We also supply software for selected programmable instruments. We offer current pre-amplifiers, electronic filters, hydrophone pre-amplifiers, and low-noise voltage pre-amplifiers. Standard products include a full line of low noise pre-amplifiers used in underwater electro-acoustic and seismic applications. Pre-amplifiers are encapsulated and hermetically sealed in cylindrical enclosures. They have a wide range of specifications. Our Model 1211 current pre-amplifier measures current with full scale sensitivity ranging from 10^-2 to 10^-12 amperes. Our Model 1212 current amplifier provides a high performance detection system for DC and AC currents. Our high impedance voltage amplifiers are used with piezoelectric transducers such as accelerometers, hydrophones and seismometers.