WATER / WASTEWATER
New digital dissolved oxygen sensor enhances operational versatility with lower maintenance costs
Myron L®
Company’s Ultrameter II™ Delivers Fast, Lab-Accurate Readings in a Handheld Instrument
Ultrameter II instruments provide a comprehensive suite of in-situ water quality analysis tools that can replace more costly and less convenient laboratory equipment.
A true, one-handed instrument, model 4P delivers Conductivity, Resistivity, TDS, and Temperature readings quickly and easily with autoranging capabilities resulting in increased reading resolution across a broad range of applications.
Emerson has announced the release of the Rosemount™ 490A Optical Dissolved Oxygen Sensor, a digital Modbus-enabled measurement device designed to enhance operational flexibility, simplify installation and reduce maintenance costs across many industrial applications in the water/wastewater treatment, biopharmaceutical manufacturing, food and beverage processing, and steam power generation industries.
Most dissolved oxygen probes for industrial applications are made for installation in specific and relatively benign conditions. These sensors are often only capable of communicating process values via analogue signals to control systems, and they require frequent calibration to maintain accuracy and avoid sensor drift.
To address these and other issues, the Rosemount 490A provides reliable and accurate dissolved oxygen measurements in demanding environments, while simplifying integration into existing control systems with digital and universal Modbus RTU communication via an accompanying transmitter. In addition to producing accurate readings within just 90 seconds of transition from dry to wet conditions, this versatile sensor is capable of measuring process media in both liquid and gas phases, without requiring separate calibrations.
The Rosemount 490A employs Environmental Protection Agency-approved luminescence- quenching technology, eliminating the need for electrolyte refills to significantly reduce maintenance requirements compared to traditional amperometric sensors. Its two- year sensing cap lifespan further minimizes downtime and associated costs, and it can be calibrated in free air.
Additionally, the chemically resistant IP68- rated design ensures reliable performance in challenging environments. Its small form factor, coupled with forward and rear facing 1-inch NPT threaded connections, simplifies installation in a variety of settings.
Unlike amperometric sensors, the 490A uses an optical sensor, which does not consume oxygen or require water flow for accurate measurements. Furthermore, versatile guard cap options provide weighted orientation, anti-fouling protection, and air blast cleaning, catering to a wide breadth of applications.
The sensor is accurate to ±0.1 milligram per litre (0 to 20 mg/L) and ±2% (20 to 60 mg/L), ensuring precise monitoring and control of dissolved oxygen levels. It seamlessly pairs with theRosemount 1058 digital transmitter, which provides a diverse range of measurement signals for compatibility with numerous host control systems.
More information online:
ilmt.co/PL/Yw5b For More Info, EMAIL:
EMAIL:
64589pr@reply-direct.com
www.myronl.com 760-438-2021
The 4P also features three preprogrammed solution models: KCl; NaCl; and Myron L’s own 442 Natural Water™ Standard. Setting the instrument to the solution model that most closely matches the constituents of the analyte yields more accurate results than those of instrumentation programmed to a single standard. A User mode can also be programmed when sampling a known solution. The result is benchtop accuracy of ±1% of reading in a handheld instrument.
The 4P is IP67 dust-tight and waterproof, NEMA6 submersible, and buoyant. And the optional bluDock™ accessory makes wireless data transfer seamless.
Model 6PFCE Equivalent (FCE
includes all features of the 4P but adds the ability to measure pH, ORP, and Free Chlorine ™).
pH readings are temperature compensated; you can choose to perform a 1-, 2-, or 3-point calibration depending on the range of samples measured to achieve ±.01 pH accuracy. The pH sensor is of a proprietary construction and includes a large potassium chloride solution reservoir for long life.
The ORP sensor utilizes a 99.9% pure platinum electrode and a reference junction shared with the pH sensor. Measurements are accurate to ±1 millivolt.
In addition, the 6PFCE
features a groundbreaking new way to determine Free Available Chlorine. Get empirical measurements of the chemical activity of a solution without the hassle and subjectivity of colorimetric and test-strip methods. The FCE
Calibration and maintenance are simple, and 6PFCE function is the fast, accurate way to determine the killing power of free chlorine species in water. It
employs a proprietary predictive ORP algorithm to determine free available chlorine levels at the actual pH of water, so you know your chlorine treatment is effective.
pH sensors are user replaceable making both Ultrameter II models
user serviceable. Live expert technical support is included for the life of all Myron L instrumentation. More information online:
ilmt.co/PL/EYm0
For More Info, EMAIL: EMAIL:
64480pr@reply-direct.com
Fast, Lab-Accurate Results!!! Ultrameter llTM E
Conductivity Resistivity TDS
ORP/Free Chlorine Equivalent (FCE TM
pH Temperature
)
900 Series
TM
Conductivity, Resistivity, TDS, Salinity, pH, ORP, Flow/Pulse, Temperature, % Rejection, Touchscreen LCD plus Additional Flexible Inputs/Outputs
ENVIROTECH-ONLINE.COM | AET MAY 2025 | 9
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