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China HM100PR Density Monitors for SF6 Gas - Reliable Factory Supply by Leading Suppliers

HM100PR Density Monitors are essential devices for monitoring the density of SF6 gas in sealed tanks. These units are designed to provide alarm signal outputs when the gas density reaches preset levels, ensuring optimal safety and reliability. With the ability to transmit real-time SF6 gas density data remotely, they facilitate online remote monitoring, making them a valuable asset in the industry. Specifically engineered for application in over 500kV EHV grade fields, these monitors incorporate multi-level protection and a comprehensive range of shielding measures to guarantee reliable operation. As a leading manufacturer and supplier in China, we ensure that our products meet the highest standards of quality and performance, making us a trusted factory for density monitoring solutions
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    Technical Parameters for Remote Module

    Power supply

    24V DC

    Anti-electromagnetic interference

    IEC61000-4-2

    IEC61000-4-3

    IEC61000-4-4

    IEC61000-4-5

    IEC61000-4-6

    IEC61000-4-8

    IEC61000-4-9

    IEC61000-4-10

    IEC61000-4-12

    IEC61000-4-17

    IEC61000-4-29

    level 4/A

    level 4/A

    level 4/A

    level 4/A

    level 3/A

    level 5/A

    level 5/A

    level 5/A

    level 4/A

    level 3/A 0.1s/A

    (8KV/15kV) (30V/m)

    (4KV)

    (+/-2Kv)

    (10V)

    (100A/m)

    (1000A/m)

    (100A/m) (4KV)

    (10%UN)

    (40%UT/70%UT)

    Power consumption

    < 2W

    Communication mode

    RS485

    Protocol

    ModBus RTU

    Baud rate

    9600bps

    Technical Parameters

    Technical Parameters

    Case diameter

    100mm

    Scale range

    -0.1 ~ 0.9MPa (customizable)

    Accuracy

    ±1.0%FS(+20±1℃)

    ±1.8%FS(-20℃~ +60℃)(gas phase)

    Degree of protection

    IP65

    Ambient conditions

    -20° C ~ +60° C, relative humidity ≤ 95%RH

    Leakage rate

    ≤ 1×10⁻⁹ Pa·m³/s (Helium leakage inspection)

    Process Connection

    M20 × 1.5, (customizable)

    Installation method

    Radial or Axial

    Electrical connection

    Plug-in connection M20 × 1.5 sealing head

    Cable size: 1.5mm² recommended, upper limit 2.5mm²

    Contact insulation performance

    Insulation resistance: >100MΩ (DC 500V)

    Withstand voltage: 2kV, 50/60Hz, 1min

    Contact type

    Magnetic snap-action switch

    80%Ag, 20%Ni, 10µm Gold plated

    Impact rating

    50g (oil-filled), 30g (non-oil-filled)

    Contact electrical parameters

    30W/50VA, 1A (upper limit)

    220VDC/380V 50/60Hz (upper limit)

    Watch glass

    Laminated safety glass

    Weight

    ≈ 1.2kg

    Pressure element

    Bourdon tube

    Frequently Asked Questions

    Q What is the power supply requirement for the remote module?
    The remote module requires a 24V DC power supply with a power consumption of less than 2W, making it energy-efficient for continuous industrial operation.
    Q What communication protocol does the remote module support?
    The remote module communicates via RS485 interface using the ModBus RTU protocol at a baud rate of 9600bps, ensuring reliable and standardized industrial communication.
    Q What is the accuracy of the pressure gauge and what are its operating temperature limits?
    The pressure gauge offers an accuracy of ±1.0%FS at +20±1℃. Under extended temperature conditions (-20℃ to +60℃, gas phase), the accuracy is ±1.8%FS. The ambient operating range is -20°C to +60°C with relative humidity ≤ 95%RH.
    Q What electromagnetic interference standards does the remote module comply with?
    The remote module complies with multiple IEC61000-4 series EMC standards, including IEC61000-4-2 through IEC61000-4-29, covering electrostatic discharge, radiated immunity, electrical fast transient, surge, conducted immunity, and more — all tested at Level 3 to Level 5 / Class A performance.
    Q What are the installation options and process connection specifications?
    The gauge supports both Radial and Axial installation methods. The process connection uses a standard M20 × 1.5 thread, which is customizable upon request. Electrical connection is via a plug-in M20 × 1.5 sealing head with a recommended cable size of 1.5mm² (upper limit 2.5mm²).
    Q What type of contact and pressure sensing element are used in the gauge?
    The gauge uses a magnetic snap-action switch contact made of 80%Ag / 20%Ni with 10µm gold plating for superior conductivity and durability. The pressure sensing element is a Bourdon tube. Contact electrical parameters are rated at 30W/50VA, 1A maximum, supporting up to 220VDC / 380V AC at 50/60Hz.

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