Guildline Instruments is an Engineering Company that designs, manufactures and markets ultra-precise instruments for the fields of metrology and oceanography. Most Guildline instruments are unique and represent the only commercially available instrument capable of uncertainties/accuracy in the sub parts-per-million range of precision bridges and standards for primary and secondary resistance calibration, Temperature Bridge as well as precision devices for measuring, calibrating AC/DC current, DC voltage and power. Guildline also manufacture world accepted DC Current Source along with Fluidized bath and Air Bath for Metrology/Oceanography.