WIKA is a leading manufacturer of high precision gauge, absolute & differential pressure indicators and pressure calibrators. The brand name, Wallace & Tiernan is owned by Evoqua Water Technologies. High precision pressure gauges and calibrators that were once branded as Wallace & Tiernan are now owned by WIKA Instruments. FLW, Inc. is a distributor of WIKA Instruments product and is in no way affiliated with or represents Evoqua.