Series LXT Smart Transmitter
On line analysis of pH, ORP, PION, DO, Conductivity & Resistivity
The LXT-230 and LXT-280 are microprocessor based, loop powered process transmitters designed to provide liquid measurement and control in its simplest form.
The units are provided in watertight NEMA-4X and NEMA-7C (LXT-280 only) configurations which are capable of being panel, universal or hand-rail mounted in the field.
Both can be installed, wired, calibrated and ready to use in minutes. The software is intuitive with simple-to-read process menus written in plain English. A fast-action membrane keypad (magnetic influence in the case of the LXT-280) facilitates the single or dual point calibration for all process variables.
Typical Applications / Industries Served
Power Industry – Heat Exchanger Leaks, Condensate Monitoring, Cooling Tower H2O Control, Boiler Feedwater Control
Pulp & Paper Industry – Demineralizer, Digester, Bleach Plant, Recovery & Waste Water
Water Treatment – Influent Monitoring, Reverse Osmosis & Desalinization Plants
Food & Beverage – pH in Fermentation Process, DO in Carbonated Beverages
Pharmaceutical – Clean-in-Place (CIP) Conductivity Monitoring
Power Industry Applications
The treatment of water utilized in a power plant is critical for reducing boiler failures. As boilers generate steam or water is evaporated by a cooling tower, dissolved minerals accumulate and eventually lead to corrosion of boiler tubes and heat exchanger leaks. To properly control and conserve the chemical additives used to inhibit the costly build-up of deposits, and to determine appropriate boiler blow down schedules, continuous on-line pH and conductivity monitoring of boiler and cooling water is essential.
Conductivity analysis is the amount of ionized salts dissolved in water. These conductive inorganic impurities are a prime indicator of mineral concentration. Conductivity, therefore, is an excellent indicator of boiler feedwater contamination as the condensate typically has a very low conductivity and even very small leaks of process water will significantly cause an upscale reading. The detection of pH levels is also critical. Low pH waters lead to corrosion while high pH can lead to scale formation.
Measurement range: Application specific
Accuracy: ± 0.10% of full scale
Linearity: ±0.05% of full scale
Sensitivity: ±1.0 mV
Stability: ±0.2% per year @ 0 to 70 °C
Operating temp: -4 to 158 °F (-20 to 70 °C)
Response time: 90% of step change in 1 second
Temperature compensation: Automatic -30 to 140 °C, RTD.; Accuracy: ±0.1% over a 0-100 °C span 50 / 60 Hz
Noise rejection: Greater than 70 db