Houston Digital Instruments is a global oilfield provider of battery operated digital gauges, position indicators, pump stroke counters and more. Our services and products are utilized in offshore, onshore and service application. HDI offers their users a superior degree of accuracy over standard mechanical instruments. Being fully independent of rig power HDI’s products continue working even in emergency power outage situations. HDI continues serve their customers with its service department ready to assist anyone in troubleshooting, refurbishment or worksite visits.