Based in Houston, Texas, HDI Instruments, LLC is a supplier of pressure-measuring systems and digital instruments for the oil and gas industry. It offers a wide range of products, such as drillers choke control console, panel gauges, mud gauges, stroke counters, position indicators and digital readout driller's pressure gauge. The firm has implemented quality management system registered by Quality Certification Bureau Inc. and in accordance with the ISO 9001:2000 standards. HDI Instruments, LLC has affiliations with the International Association of Drilling Contractors (IADC) and Society of Petroleum Engineers (SPE).