PULSAR MEASUREMENT MDOT THERMAL MASS FLOW METER

PULSAR MEASUREMENT MDOT THERMAL MASS FLOW METER

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Specifications
  • MDOT THERMAL MASS FLOW METER , THERMAL MASS FLOW MONITORING: Physical Specifications Spec: Description: Probe Diameter: 3/4 inch Sensor Material: 316 stainless steel Enclosure: NEMA 4X (IP67), aluminum, dual 3/4 inch FNPT conduit entries Performance Specifications Flow Accuracy: Air: ±1% of reading ±0.2% of full scale Other gases: ±1.5% of reading ±0.5% of full scale Accuracy specification applies to customer's selected flow range Unobstructed Pipe Requirement: Insertion: 15 diameters upstream, 5 diameters downstream Inline: 8 diameters upstream, 4 diameters downstream Flow Repeatability: ±0.2% of full scale Flow Response Time: 0.8 seconds (one time constant) Temperature Accuracy: ±0.6° C (±1° F) Calibration: Factory calibration to NIST-traceable standards MDot Max Cal: In-situ, operator initiated calibration validation
详情

The MDot™ is one of the most technically advanced gas flow meters specifically designed for water and wastewater. An innovative Thermal Mass Flow Meter and Temperature Transmitter that operates on the law that gases absorb heat. Specifically developed for the demands of the water and wastewater industry, where aeration, digestion, and cogeneration play crucial roles.

Use the Pulsar Measurement MDot™ to successfully measure air, methane (natural gas), and methane/CO2 mixes (digester and biogas). Microprocessor-based and field programmable, the MDot™ features two sensor elements, with one sensor element detecting the gas temperature and the second maintained at a constant temperature above the gas temperature. When gas flows past the sensor, the energy required to maintain the constant differential temperature as heat is siphoned into the gas is proportional to the mass flow rate.

Gas Flow Measurement in the Water and Wastewater Industry

The MDot™ Thermal Mass Flow Meter has been designed to meet the demands of the water and wastewater industry, where aeration, digestion, and cogeneration play crucial roles.

Optimize your aeration blower systems and save money on operation costs by installing the MDot™ on your main air header and each individual feed line. The MDot™ is highly accurate and has incredible turndown, perfect for modern systems where blowers are variable speed.

In aerated grit removal systems, installing the MDot™ will allow you to accurately adjust your air feed process for the varying influent conditions seen at the treatment plant. With incredible turndown, the MDot™ ensures accurate measurement at minimal to maximum wastewater volumes.

For your anaerobic digestion or biogas systems, the MDot™ is the right solution to measure the gas output. With the best low-flow performance compared to other types of gas meters, the MDot™ ensures you are always making a measurement and able to meet environmental regulations for monitoring output. The built-in MDot™ GasSelect feature allows you to change your methane and CO2 gas composition, to adjust for changes in your process, without having to remove the meter to be sent back for recalibration. You’ll never have to stop your process or worry about inaccuracies because of gas composition.

As the world moves over to more renewable and sustainable energy, we often see cogeneration power systems set up within water and wastewater treatment plants. These cogeneration systems supply the wastewater market with standby power or create green/bioenergy to reduce energy costs. The digester gas or biogas output is commonly used to fire boilers and hot water heaters, generate electricity to operate pumps and blowers, or generate electricity to sell back to the grid. MDot™ provides accurate and reliable flow monitoring of methane and other biogases. If methane is used to feed cogeneration systems when produced digester gas is low, the MDot™ can be used to accurately measure these systems. Finally, since methane is a significant greenhouse gas compared to CO2, if cogeneration is not utilized at your facility, you can use the MDot™ to accurately track how much gas is flared in order to report to regulatory agencies.

Mass Flow

The MDot™ measures mass flow, an advantage over other gas flow meter technologies which measure volumetric flow rate only. Volumetric flow is incomplete because temperature and pressure are unknown and must be measured separately. The MDot™ provides a direct measurement of gas flow in Mass units (kg/hr, lb/hr), standard volumetric flow rate units (SCFM, SLPM), or normal units (NM3/hr, NLPM), with no additional or pressure measurements required. Turndown is also significantly better with thermal mass technology, with 100:1 typical and 1000:1 achievable. This means that no matter how much your gas flow process changes, you can have confidence your meter is always able to measure and measure accurately.

An onboard 2-line x 16-character backlit LCD display shows flow rate, total flow, elapsed time, process gas temperature, and alarms. Featuring a USB port, and a free Pulsar Measurement PC-based software program that displays flow meter readings, and permits flow meter configuration, obtaining your flow readings and flow meter set-up has never been so easy!

 

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