Industrial Flowmeter

HFM-II-401 / HFM-II-405

Features

• High accuracy in Nitrogen
• Standard: ± 1% full scale
• Polynomial: ±(0.5% reading + 0.2% full scale)
• Mountable remote electronics package for maximum
flexibility
• Hazardous Location approval pending
• Choice of RS232, RS485 or Ethernet
• Operation with analog and/or digital commands and
outputs
• 4 pin D-coded M12 Digital Connector
• Built-in Totalizer measures total amount of gas
added to a system
• IP65 environmental protection (NEMA 4)
• Powered with 24 VDC or ± 15 VDC
• NIST Traceable Calibration Certificate

Applications

• Process gases
• Industrial gas distribution
• Petrochemical
• Fuel cell testing
• Pharmaceutical production
• Secondary calibration reference
• Gas generation

Design Features
The 400 Series is a new family of flow instruments which is specifically designed to meet the needs of the industrial gas flow market. Each instrument in the series can be driven by a +24 VDC power supply. In addition, the “I” family in the 400 Series features an IP-65 enclosure which will allow the use of the instrument in a wide variety of environments.

The electrical connection can be made via either a terminal strip located inside the enclosure or through an IP-65 compatible electrical connector, which can be quickly connected. All of the instruments include both analog and digital I/O. This signal is linear to the full scale flow rate of the measured gas.

Intensive research has resulted in a vastly improved linearity. This becomes more apparent when different gases are measured. The 400-I series minimizes the large changes in linearity that typically occur when the flowing medium changes.