ANALYTICAL MEASUREMENT
GSI offers a broad range of analytical measurement products for the analysis of liquid or gaseous process streams. Liquid measurements include pH, conductivity, dissolved oxygen, and density. Gas analytical include oxygen, combustible gas, toxic gas, and flame detection.
pH Transmitters, Sensors and Cables
pH is a measurement of the acidity or alkalinity of a liquid. The pH scale ranges from 0 to 14 with water being a neutral value of 7. Hydrochloric acid has a value close to 0 and Potassium Hydroxide has a value of 14. pH sensors are calibrated with fluids (referred to as buffers) of known pH values. A broad range of sensor types, materials, and mounting configurations are available to suit the particular process.
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- Touch screen display with simple menu structure
- Enhanced diagnostics, trend displays, and log books
- Dual input circuitry with liquid earth
- PID control output with current or relays
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- Simultaneous measurement of pH and ORP
- Integral PT1000 temperature element
- Double junction reference, porous PTFE diaphragm, platinum ground
- Pressure compensation design for the PH20
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Conductivity Transmitter
Conductivity is the ability of a solution to pass an electric current. It is typically expressed in siemens/microsiemens or mhos/micromhos. It is applied broadly for the measurement of impurities in water or for concentration measurement of dissolved chemicals.
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- Touch screen display with simple menu structure
- Enhanced diagnostics, trend displays, and log books
- Toroidal inductive conductivity sensor input for 1 to 2000 microsiemens
- PID control output with current or relays
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- Touch screen display with simple menu structure
- Enhanced diagnostics, trend displays, and log books
- Two or four electrode sensors with range of 0 to 200 microsiemens
- PID control output with current or relays
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Dissolved Oxygen
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- High precision monitor with three electrode Oxytrace G sensor
- 0-20 ppm or 0-200 % saturation (at 25°C)
- Automatic air pressure and temperature compensation
- Short rinse-down time due to integrated guard
- Factory tested, ready for use
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Sodium
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- Trace sodium analyzer for ppt-levels
- Precisely controlled reagent addition
- Programmable automatic calibration
- Internal data logger accessible by HyperTerminal
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Silica/Phosphate
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- Colorimetric process analyzer for silica in high purity water
- Sample concentration module for low ppt detection limit
- Temperature controlled reaction chamber
- Programmable automatic calibration
- Internal data logger accessible by HyperTerminal
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Hydrazine
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- Amperometric three-electrode system
- Extremely stable zero point
- Sample conditioning with highly effective diisopropylamine
- Factory tested and calibrated on wet bench
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Combustion Oxygen
Zirconia oxygen analyzers are used to measure the concentration of oxygen in a flue gas stream. The flue gas passes across a heated zirconia cell that has a platinum electrode on each side of the cell. One side of the cell is exposed to air (reference) and the other side of the cell is exposed to the stack gas (sample). Oxygen ions flow through the heated zirconia cell from one electrode to the other. The Nernst equation can be applied to calculate the force by measuring the electromotive force generated by the two electrodes. The probe is mounted in-situ in the stack gas stream at process conditions.
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- Touch screen LCD display with real time trending
- Automatic calibration functionality
- Rugged zirconia sensor with long life in difficult services
- Multi channel version (up to 8) with AV550
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Density
Liquid density measurement is available utilizing coriolis or nuclear technologies. The coriolis sensor measures the frequency of vibration of a tube while the nuclear instrument measures the amount of radiation that passes through a fluid. Gas densitometers consist of a vibrating spool whose frequency varies with the density of the gas surrounding it.
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- Liquid or gas density measurement along with mass flow
- Integral transmitter with multi line display
- Fractional sizes to 6” in line design
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- Non invasive, clamps outside the pipe
- Superior density measurement for aggressive slurries
- Low activity sources available
- Integral transmitter
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Gas Detection
Protecting personnel and plant safety, gas detectors warn of abnormal levels of toxic, explosive, or flammable gases. Infrared technology is utilized to measure flammable hydrocarbon gases in the LEL range such as natural gas. Catalytic sensors are primarily used for Hydrogen gas in the LFL range. Electrochemical sensors measure levels of toxic gases such as hydrogen sulfide, chlorine, and sulfur dioxide.
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- Fixed monitoring of flammable hydrocarbon gases (0-100% LEL)
- Infrared sensor with superior optics
- Routine calibration not required
- Explosion proof stainless steel housing
- HART and Emerson AMS
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- Electrochemical sensor with fast response
- Measurement of H2S, SO2, CL2, CO, NO2, O2
- 4-20 mA and relay outputs
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Flame Detection
Flame detectors utilize infrared and/or ultraviolet technologies to rapidly detect presence of a flame in a defined space. They are utilized in power plants, refineries, munitions facilities, and industrial plants to protect personnel and plant. They are commonly tied to water or foam systems to quickly extinguish fires.
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- Triple frequency infrared sensing
- Detection range of 210 Feet
- Automatic optical integrity check of sensor
- Relay, Current, and Modbus Outputs
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