- electromagnetic with no moving parts
- simplified hot tap insertion design
- installs in 3-72" (80-1800 mm) diameter pipes
- selectable 4-20mA, 0-5V or 0-10V output
- -500Hz frequency output
- scalable pulse output
ISM 5.0 Insertion Magmeter
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ISM 5.0 Insertion Magmeter Measure flow of water and conductive liquids in full pipes from 3 to 72" (80 to 1800 mm) diameter. The ISM 5.0 dual pair electrode sensor inserts through a tap in the pipe wall. It can be easily installed in new pipe systems or by hot tap in pressurized pipes with flowing liquids. There are no moving parts so obstruction to flow and pressure drop is minimal. Installation through a full port ball valve allows easy retraction and reinsertion without shutting down flow. The insertion depth is adjustable according to the pipe diameter and an insertion depth gauge is supplied with each flowmeter. The optional Installation Hardware Kit includes a branch outlet, close nipple and full port 1” isolation valve. The ISM 5.0 Insertion Magmeter senses flow using a low maintenance electromagnetic design with no moving parts. The dual-electrode sensor and continuous auto-zero function provides high accuracy – even at low flow rates. State-of-the-art electronics and patented design features help maintain its NIST traceable accuracy over time. No Onsite Calibration Required Based on your pipe type and size, liquid and flow rate each ISM 5.0 Insertion Magmeter is shipped from our factory configured for your application and ready to install. Connect the isolated 4-20mA output to control system or remote display, or use the relay pulse output. |
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| How It Works
The ISM 5.0 Insertion Magmeter operates based on Faraday’s Law of electromagnetic induction: as flow velocity of a liquid increases through the magnetic field generated by the sensor head of the ISM flow meter, electrodes measure the voltage increase to accurately calculate flow. Four electrodes measure the induced voltage on opposite sides of the sensor. The voltage readings are sampled and averaged. The ISM 5.0 Insertion Magmeter measures flow of electrically conductive liquids (20 µS/cm or greater) in full pipes. For proper measurement on plastic pipes the electromagnetic flow meter requires electrical grounding by connection to grounding rings or ground probes inserted into the pipe. Readings are not affected by the fluid temperature, pressure or viscosity. |
Operation based on Faraday’s Law of electromagnetic inductionProvide a Greyline ISM 5.0 Insertion Magmeter complete with all installation hardware necessary to enable insertion and removal of the meter without system shutdown. The flow meter shall be hand-insertable up to 400 psi. For installations in non-metallic pipe, install grounding rings or probes. Materials of construction for wetted metal components shall be 316 SS. The flow meter shall average velocity readings from two sets of diametrically opposed electrodes. Each flow meter shall be individually wet-calibrated against a primary volumetric standard that is accurate to within 0.1% and traceable to NIST*. A certificate of calibration shall be provided with each flow meter. Accuracy shall be within ± 1% of rate from 2-20 ft/s. Overall turndown shall exceed 100:1.
Output signals shall be completely isolated and shall consist of the following: (1) analog output; 4-20mA, 0-10V, or 0-5V jumper selectable, (1) scalable dry contact output for totalization, and (1) high resolution frequency output for use with peripheral devices. ISM 5.0-B for Bi-directional applications shall provide additional contact outputs for direction and flow totalization in each direction. Each flow meter shall be certified to NSF Standards and covered by the manufacturer’s two-year warranty.
* National Institute of Standards and Technology
