DKK-TOA

Analytical & Environmental Measurement Instruments · Shinjuku, Tokyo

DKK-TOA Corporation is a measuring-instrument maker focused on water, air, medicine and gases. Its environmental and process instruments monitor water, air and production processes at semiconductor, food and chemical plants, petroleum facilities, water purification plants and sewage treatment works, including analyzers for items regulated under Japan's air and water pollution laws.

Its laboratory range includes pH and conductivity meters, automatic titrators and ion chromatographs, and its medical products include dialysis solution dissolving devices. It also makes detectors for flammable and toxic gas leaks and runs a nationwide service network. It had 596 consolidated employees as of March 31, 2025.