The Shortridge Instruments ADM-870 Airdata Multimeter is a multi-functional instrument engineered for precise measurement of air velocity, differential and absolute pressure, and temperature. Designed for HVAC systems, cleanrooms, hospitals, and laboratories, it delivers accurate air distribution assessment across demanding applications. Density correction enables readings in local or standard atmospheric conditions, supporting mass flow calculations. Internal memory stores up to 200 readings with sequential labeling, averaging, and totaling capabilities. RS232 serial output facilitates integration with external data systems and printers.
Technical Specifications
Air Velocity Measurement
• Range: 25 to 29,000 fpm (with Dwyer Series 160 pitot tube); 25 to 5,000 fpm (AirFoil probe); 25 to 2,500 fpm (VelGrid)
• Accuracy: ±3% of reading ±7 fpm (50 to 5,000 fpm range)
• Pitot tube readings 8,000 to 29,000 fpm are based on compressible isentropic flow theory and are not NIST traceable
Differential Pressure Measurement
• Range: 0.0001 to 60.00 in wc
• Accuracy: ±2% of reading ±0.001 in wc (0.0500 to 50.00 in wc)
• Safe Pressure: 20 psid
Absolute Pressure Measurement
• Range: 10 to 40 in Hg (referenced to vacuum)
• Accuracy: ±2% of reading ±0.1 in Hg (14 to 40 in Hg)
• Maximum Safe Pressure: 60 psia
Temperature Measurement
• Display Range: -67.0°F to 250.0°F
• Accuracy: ±0.5°F (32°F to 158°F with ADT440 Series TemProbes)
• Resolution: 0.1°F
• Safe Exposure Range: -100°F to 250°F
Air Flow Measurement (with Series 8400 FlowHood)
• Supply: 25 to 2,500 cfm; Exhaust: 25 to 1,500 cfm
• Accuracy: ±3% of reading ±7 cfm (100 to 2,000 cfm)
Air Density Correction
• Correction Range: 14 to 40 in Hg and 32°F to 158°F
– Key Features
• High-contrast LCD display
• 200-reading internal memory
• Data output via RS232 serial interface
• Durable ABS casing
– Typical Applications
• HVAC system balancing and diagnostics
• Cleanroom air distribution verification
• Hospital and laboratory airflow monitoring
– Compatibility & Integration
The ADM-870 accepts Dwyer Series 160 pitot tubes, AirFoil probes, VelGrid arrays, ADT440 Series temperature probes, and the Series 8400 FlowHood accessory.
