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www: | www.prei.co.za |
more information about PREI Instrumentation |
GLI International announced a new line of water and wastewater samplers through a joint venture with the well-known Manning Environmental of Georgetown, Texas. Founded in 1972, Manning Environmental makes
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During the 1960s, a significant advance in infrared temperature measuring came about with the introduction of ratio or two-colour infrared thermometry.
This technology uses two infrared sensors within
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GLI Model 5600 series dissolved oxygen sensor carries a one-year guarantee on its replaceable membrane cartridge. If the cartridge fails for any reason, except for physical damage, it will be replaced
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Many industrial processes literally eat pH electrodes, with replacement being required every few weeks. The patented GLI differential sensors have significantly improved.
This sensor performs in the
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One of the best ways to quantify the quality of water is to use a continuous turbidity monitoring system. The GLI Accu-4 is the latest generation of turbidity monitoring equipment. By using a four-beam
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Transducers which look like CTs can provide a 2-wire, 4-20 mA d.c. signal for monitoring AC currents from 10 to 2500 A. No auxiliary power is required, and the device operates from a loop power supply
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Using the Hart protocol, numerous items can be monitored on a single communication line including process variables, temperature, relay status, configuration changes and other functions
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Traditionally it has been acceptable to filter raw water to a reasonably good clarity (0,5 to 1,5 NTU) and then disinfect the water with chlorine, UV radiation or ozone to kill all the bugs.
In the past
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GLI Model 5600-series dissolved oxygen sensor carries a one-year guarantee on its replaceable membrane cartridge. If the cartridge fails for any reason, except for physical damage, it will be replaced
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In pH measuring applications such as hydrofluoric acid, where glass electrodes have a short life, antimony electrodes are usually used. There are many makes of antimony electrode sensors available but
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There is no glass formulation currently available that has zero sodium ion error (alkaline error). Since there will be some error, it is important that the error be constant and reproducible. With many
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Two models of the GLI flow monitor/totaliser, available from PREI Instrumentation, can simultaneously accept inputs from up to four flow sensors, and provide the flow rate and totalised flow for each
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