Since 1978 NATIONAL’S corporate mission has been to meet the needs of customers by supplying top quality custom liquid level switches, controls, indicators and accessories faster than any other company in our industry. Over the years NATIONAL has added many standard products which are available off the shelf. We are pleased to offer this product guide to you and we are confident it will help you specify a product to meet your liquid level control needs. Please call our sales engineering staff for personal, prompt, technical assistance if you have any questions about our products or any liquid level control application.
Multi-Level Sensors
For indication and warning, automating pumps, or system control, National’s Multi-Level Sensors perform reliably and accurately.
AST Sensors
National offers a complete line of AST sensors designed to provide high level alarm contacts for above ground storage tanks.
Non-Electric Indicators
The answer for simple and reliable tank gauging in applications where there is no power or hazardous areas where you want to avoid bringing in electrical systems.