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Interactive descriptions, images, and video of unique features and core technologies

Four-Sensor Design Innovation 640i/780i

Advancements to traditional thermal sensor technology for greatly improved accuracy

qTherm Technology

Learn about the revolutionary “brain” inside the instrument as well as Dial-A-Gas, Dial-A-Pipe and the qTherm Gas Library

User Interface

Push-button display & user software manages changes to the meter as well as diagnostics and tuning

Electronics & Inputs/Outputs

Information about options, configuration, output signals and digital communications

Electronics & Inputs/Outputs

Electronics & Inputs/Outputs

  • Power: 100-240 VAC

  • Power: 24 VDC +/-10% 1 amp

  • Output: 4-20 mA: Gas Mass Flow

  • Output: 4-20mA: Temperature

  • Output: 4-20mA: Pressure (Optional)

  • RS-232

  • Output: Alarms (Contact SPST/opto relays)

  • User Definable Pulse for Totalizer

  • Foundation Fieldbus, Modbus, Profibus DP, HART (pending)

Connection Point

Connection Point

Located on both sides of the enclosure are conduit junction points for power and communications
Terminal Block

Terminal Block

Easy connection point for power, analog outputs, alarm and totalizer relays, and digital communications protocols
Power Board

Power Board

100-240 VAC or 24 VDC input power
qTherm Sensor Drive

qTherm Sensor Drive

qTherm “brain” printed circuit assembly, with hyper-fast microprocessors, calculates mass flow rate, multivariable outputs, Dial-A-Gas, Dial-A-Pipe, and enables the proprietary qTherm gas library.

More Information

qTherm “Brain” printed circuit assembly with hyper-fast microprocessor that caluclates mass flow rate, multivariable outputs, gas selection, temperature and pressure, as well as outside temperature, via a comprehensive heat transfer model

Display Board

Display Board

Houses the UltraBright display and push button interface for the instrument
Output Signals

Output Signals

Analog and digital outputs are available.