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Specification
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General
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Measured Variables
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- Density in kg/m³
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- Temperature in °C
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- Pressure in bar absolute
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Derived Measured Variables (Customer-specific):
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- Concentration of binary gas mixtures, ideal volume percentages (= molar percentages) in % standard density
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- Average molar mass
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- Customer-specific measured variables
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Permitted Media
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- Hydrogen (H2)
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- Helium (He)
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- Nitrogen (N2)
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- Oxygen (O2)
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- Carbon dioxide (CO2)
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- Argon (Ar)
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- Other media with individual clarification
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Permitted Mixtures
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- Refer to documentation for selected mixtures
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- Other mixtures with individual clarification
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Performance
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Accuracy of Measurement
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- Density: <0.1 kg/m³
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- Temperature: <0.8 °C
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- Pressure: <0.04 bar
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- With field calibration density: <0.05 kg/m³
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Repeatability
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- Density: <0.015 kg/m³
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- Temperature: <0.06 °C
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- Pressure: <0.005 bar
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Temperature Conditions
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Permitted Medium Temperature
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-20…+60 °C
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Permitted Ambient Temperature
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-20…+60 °C
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Permitted Storage Temperature
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-20…+60 °C
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Range of Application
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Density Measurement Range
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0.2 … 19 kg/m³
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Pressure Range
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- Max. measuring range: 1…10 bar (absolute)
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- Use gas mixtures with argon (Ar)
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- Bursting pressure: 30 bar
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Vibrations
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Under clarification
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Environmental Conditions
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Climate class: Not yet defined
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Electromagnetic Compatibility
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According to IEC 61326-1
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Vibration and Shock Resistance
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Not yet defined
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Material
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Housing
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- Stainless steel: 1.4404 (316L)
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Medium Wetted Material
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- Stainless steel: 1.4404 (316L)
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Electronic Board
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Dimensions / Design
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Dimensions
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63 mm x 27.8 mm x 34.5 mm³ (with M8 plug)
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Weight
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<150 g
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Degree of Protection (Installed Condition)
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IP67 according to IEC 60529
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Fluidic Interface
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Fluidic Interfaces
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G½” thread
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Electrical Interface
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Connection
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M8 connection, 4-pin, according to IEC 61076-2-104
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Communication
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Continuous, RS485 hardware standard, Proprietary Modbus RTU communication protocol (see data sheet)
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Power Supply
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DC 4.5…12 V (max. 200 mW)
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Cable and Plug
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Not included in scope of delivery. Requirements for connection cable, power supply unit, and plug:
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- Power supply unit with safety extra-low voltage (SELV) or protective extra-low voltage (PELV).
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- M8 plug, 4-pin
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- Maximum permissible cable length: 30 m
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- Cable recommendation: Lumberg Automation M8 Standard Sensor / Actuator Connectors RKMWV 4-07
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RS485 Interface
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According to standard EIA/TIA-485-A
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Maximum permissible voltage:
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- A and B: -11 V…+15 V
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- (A-B) or (B-A) with active termination: 6 V
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Switchable 120 Ω termination
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Integrated Filter
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Filter
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Sinter bronze 50 µm (theoretical pore size)
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Certificates and Approvals
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CE Mark
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The density sensor meets the legal requirements of the EC directives. TrueDyne Sensors AG confirms the successful testing of the density sensor with the affixing of the CE mark.
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RoHS
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All installed components meet the requirements of the RoHS III directive.
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Electromagnetic Compatibility
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According to IEC 61326-1
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Accessories and Spare Parts
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Adapter Fluidic
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Adapter “G½” thread for the fluidic interface.
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Adapter Electric
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USB-RS485 incl. M8 plug
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Sealing Ring
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Sealing ring for the replacement of a damaged sealing ring
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Filter
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Set consisting of filter, spring washer, and retaining ring for the replacement of a dirty filter.
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