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Model 973-SF6

fOR SF6 purity & SO2 concentration in SF6 gas insulated SWITCHGEARS 

The MBW CALIBRATION™ MODEL 973-SF6 is an advanced SF6 gas analyzer for the measurement of humidity, SF6 purity and SO2 concentration in SF6 gas insulated switchgears (GIS) and other high voltage equipment. With its internal gas containment and recovery system, the 973-SF6 provides a high quality and environmentally safe measurement solution within a single self-contained unit.  

Pure SF6 is the standard filling within GIS, but over time gas compartments become contaminated with water vapor (H2O) through permeation and by desorption from internal materials. Whilst water vapor and SF6 do not normally react with each other, in the presence of a high-energy discharge, hydrogen and oxygen disassociated from water vapor will react with the sulfur and fluorine from SF6 to form decomposition by-products. These include sulfur dioxide (SO2) and hydrofluoric acid (HF) that are corrosive to the internal components of gas compartments.  SF6 with low water vapor content (low humidity) significantly reduces the potential for formation of these corrosive compounds, which is why accurate and repeatable measurement data is an invaluable part of any GIS preventative maintenance program.

The 973-SF6 includes:

  • Transport Case 973-SF6
  • Aluminum shiel with logo MBW (Peli-Case 1610/1620)
  • Cotton swabs, sterile (10 pieces)
  • Serial cable DBP 3m 1:1 male/female
  • RS-232/ USB Keyspan Adapter
  • Hex key for SOmodule
  • USB stick with 973-SF6 software and operation manuals

All accessories can also be ordered separately to replace damaged or missing components.

APPLICATIONS

  • Electrical power utilities
  • Gas insulated switchgear
  • SF6 gas manufacturers and suppliers

SULFUR DIOXIDE (SO2)

Sulphur Dioxide is the most common decomposition by-product measured during SF6 gas quality analysis.  Unlike most other decomposition products, it is relatively unreactive once formed, so its concentration remains stable over time, so measurement results are more dependable as a condition assessment parameter.

Since 2012, all our 973-SF6 MODEL analyzers have been produced ‘SO2 ready’.  This means that SO2 measurement can be easily added during production, or at a later time by the user. Measurement is based on a replaceable electrochemical sensor cell fitted in the gas path close to the sample inlet connection.  0…100 or 0…500 ppm ranges are available.

SO2 measurement performance is influenced by several factors that in combination can lead to measurement errors.  For this reason, measurement accuracy is specified ≤ ±2 % of the measured value.  To meet this specification, all SO2 sensors for use with the 973-SF6 are individually calibrated in gravimetrically prepared SF6/SO2 gas mixtures at three points over their specified range:

  • 100ppmv range:  0, 10, 100 ppmv
  • 500ppmv range: 0, 100, 500 ppmv
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Process Insights_MBW 973-SF6_instrument
Process Insights_MBW 973-SF6_instrument

For a complete range of analytical instrumentation, applications, systems, and service options, we will work to match your needs and budget and provide the optimal, and most stable process analysis solution for your application. 

SALES | TRAINING INQUIRIES

AMERICAS: info.americas@process-insights.com

EMEAI (includes India): info.emeai@process-insights.com

APAC:  info.apac@process-insights.com

CHINA:  info.cn@process-insights.com

SERVICE | TECHNICAL INQUIRIES ONLY


Solutions Flyers


SF6 COUPLINGS

DN8 Coupling Part no. 102983

SF6 coupling DN8 with quick coupling (Rectus)

973-SF6_Coupling_DN8-500x333
DN20 Coupling Part no. 102983

SF6 coupling DN20 with quick coupling (Rectus)

973-SF6_Coupling_DN20-500x333
DN6 Coupling Part no. 104041

SF6 coupling DN6 with quick coupling (Rectus)

973-SF6_Coupling_DN20-500x333
DN12 Coupling Part no. 103477

SF6 coupling DN12 with quick coupling (Rectus)

973-SF6_Coupling_DN20-500x333
DN7 Coupling Part no. 100903

Double coupling DN7 (male / female)

973-SF6_Coupling_DN20-500x333
90° angle Part no. 103410

90° angle with Rectus couplings

973-SF6_Coupling_DN20-500x333
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OUR CHILLED MIRROR SOLUTIONS FOR HUMIDITY MEASUREMENT

MODEL 973S™

MBW CALIBRATION™ Dew Point Chilled Mirror for Spot & Continuous Measurement of Dew/Frost Point In Air & Other Gases

Original full specification 

Process Insights_MBW Model 973S_chilled mirror hygrometer

MODEL 973CA™

MBW CALIBRATION™ Dew Point Chilled Mirror for Spot & Continuous Measurement of Dew/Frost Point In Air & Other Gases

Compressed air specification

Process Insights_MBW Model 973S_chilled mirror hygrometer

MODEL 973E™

MBW CALIBRATION™ Dew Point Chilled Mirror for Spot & Continuous Measurement of Dew/Frost Point In Air & Other Gases

Most cost-effective solution

Process Insights_MBW Model 973S_chilled mirror hygrometer

MODEL 973L™

MBW CALIBRATION™ Dew Point Chilled Mirror for Spot & Continuous Measurement of Dew/Frost Point In Air & Other Gases

For low range specifications

Process Insights_MBW Model 973L_chilled mirror hygrometer

MODEL 373™

MBW CALIBRATION™ Humidity & Temperature Reference Dew Point Chilled Mirror up to 125°C
Process Insights_mbw 373 chilled mirror hygrometer

MODEL 473™

MBW CALIBRATION™ Humidity & Temperature Reference Dew Point Chilled Mirror up to 125°C
Process Insights MBW Model 473-RP2-2020

MODEL 573™

MBW CALIBRATION™ Dew Point Chilled Mirror for Fixed Industrial Installations & Measures Above Ambient Temperature
Process Insights_MBW Model 573_chilled mirror hygrometer

T12 Thermometer

MBW CALIBRATION™ Multi-Channel Stable Platinum Resistance Thermometer (PRT)
Process Insights_mbw temperatur T12_instrument

TempControl™ Software

Mirror Temperature Software
Process Insights_mbw temperatur T12_instrument

GECKO R2™ Metrology Software

Mirror Software
Process Insights_mbw temperatur T12_instrument
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OUR CHILLED MIRROR SOLUTIONS BY INDUSTRY

Questions? We’re here to help.