Density & SG Measurement

Access Instrumentation supply the Thermo Scientific Sarasota range of gas density meters, specific gravity meters, and liquid density meters which meet the challenges of fiscal/custody transfer metering, liquefied gas metering, fuel gas management, and burner control through the continuous, accurate measurement of density, specific gravity or other density related variables within the oil and gas, petrochemical, and power industries. The savings available through the use of the meters, the availability of near real time control signals, and the low cost of ownership compared with alternative measurement methods such as chromatographs, make plant efficiency and optimization a reality.

 Sarasota Gas Density Meters

imgThe Sarasota FD900 Density Meter – formerly the Sarasota FD700 Density Meter – is designed for high accuracy density and density related measurement of gases, liquefied gases and low viscosity fluids. Providing continuous on-line density measurement, with accuracy to 0.1% of reading, the FD900 can be installed via sample by-pass or direct in-line. It is ideal for analyzer applications.

The Sarasota ID900 Insertion Density Meter – formerly the Sarasota ID700 Insertion Density Meter – gives accurate, continuous density measurement of gas, liquefied gases and low viscosity fluids in true process conditions with direct insertion into the pipeline or vessel by a choice of methods. With features such as a retractable option, via the RTR900, ensuring no downtime on pressurized lines, the Sarasota ID900 is a smart choice for process quality and control.

The Sarasota PD900 Pocket By-Pass Density Meter – formerly the PD700 Pocket Density Meter – is designed specifically for the high accuracy measurement of gases. It provides continuous on-line density measurement at process conditions by directly mounting the thermowell into the pipeline. Ease of servicing ensures no downtime on pressurized lines, and no on-site calibration is required.

The Sarasota RTR900 retractor – formerly the RTR800 retractor -is a screw jack designed for use with ID900 density meters in high-pressure measurement applications.  It allows insertion and removal of the ID900 under operational line conditions, allowing measurement at true process conditions.  With integral seal housing, and stainless steel / aluminium bronze construction, the RTR900 has a wide operating temperature span and a high-pressure capability.

Main applications for Sarasota Gas Density Meters include:

  • Fiscal / Custody transfer gas metering
  • Ethane cracking and ethylene production
  • Energy management systems
  • Stack emissions analysis and control
  • LNG metering and control
  • Calorific value estimation
  • Specific gravity measurement

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Sarasota SG901 Specific Gravity Gas Analyser

imgThe Sarasota SG901 – formerly SG900 / SG800 / SG700 – is a self-contained by-pass sample conditioner and gas specific gravity analyzer, used on dry and wet gases to measure density, pressure and temperature. With fast response times and accuracy to 0.2% of reading, the SG901 provides options for a variety of applications. Main applications for Sarasota SG901 include:

  • Fuel gas monitoring
  • Blending control
  • Standard volume flow
  • Energy determination

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Sarasota Liquid Density Meters

Access Instrumentation supply the Thermo Scientifc Sarasota range of liquid density meters which measure density or density related variables within the oil and gas, petrochemical, chemical, food and beverage and general process industries.  With high accuracy available to +/-0.1Kg/m3 these online continuous liquid meters provide key information for process monitoring and control, quality control, product interface detection and custody transfer applications.


The Sarasota FD910 Industrial Density Meter is designed for high accuracy measurement of general process liquids and slurries, giving continuous online density or density related measurement with straight-through flow. Built to be insensitive to plant/pipeline vibrations, the FD910 Industrial Density Meter has a wide operating temperature span and options to suit an extensive range of applications.

The Sarasota FD950 Chemical Density Meter is designed for the high accuracy measurement of aggressive liquids and slurries. It provides continuous online density measurement, providing straight-through flow in a compact and lightweight design. Accurate to +/- 0.1kg/m3, The FD950 Chemical Density Meter has a wide operational density range of 0 to 2100kg/m3.

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Sarasota Density Electronics

imgThe Sarasota HME900 headmounted electronics option can be fitted to all density meters in the range and gives the user the power of control room electronics in the field with full HART compatibility. For applications requiring greater input/output flexibility or where the electronics are control room based, users may prefer the Sarasota CM515 panel mounted density converter.

The HME900 accepts period and PT100 signals from the density transducer plus, when required, a pressure signal from a pressure transducer enabling the full range of density calculations. The HME900 electronics will provide a loop powered 4-20mA output relative to density or a derived parameter with full HART compatibility.

The CM515 interfaces with all common field transmitters and offers both a printer and communications interface (RS232/RS485). It performs a number of density converter and flow computing calculations and is user configurable.

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Gamma based Density Meters

With a completely non-intrusive system, it is not affected by pressure, viscosity, corrosives or abrasives, Thermo Scientific have redefined the standard for gamma based density measurement. Simply mounting around the existing process pipe eliminating the need for pipe modification and process downtime during installation.

3680 Smart Density Transmitter

imgThe innovative 3680 Smart Density Transmitter redefines the standard for gamma-based density measurement.  It combines an improved scintillation-based detector with the power of a “smart” transmitter in an explosion proof housing.

Features and Benefits:

  • Non-contacting design makes the 3680 ideal for abrasive, corrosive, high pressure and high temperature applications.
  • Integrated transmitter/detector reduces installation and wiring costs.
  • Accuracy up to ± 0.0001 g/cc.
  • Measurements in Density Units, lb/gal, % by weight solids, Brix
  • PVT (Poly Toluene) scintillation detector resistant to moisture and shock damage.
  • Accepts All Voltages From 90 to 250 VAC 50/60 Hz and/or 18 to 36 VDC, should loss of AC power occur, the unit switches to DC power automatically.
  • HART Protocol
  • Easy-to-use English language user interface makes for simple set-up and calibration through the HART Communicator.
  • Self-diagnostic and alarm history software reduce troubleshooting time.
  • FMRC, CSA/ATEX approved.
  • CE Marking.

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