Alttiss water meter multyjet b class

Key Features & Design

• Multijet / Multijet principle: Water enters through multiple jets to spin an internal turbine (impeller). The rotation of the turbine is transferred (often magnetically) to the register/dial, giving a volumetric reading. iotaflow.com+2alttissmeters.com+2

• Dry dial / Dry register: The register (reading mechanism) is separated from the water chamber, so the dial remains dry. This helps prevent fogging, corrosion, and makes reading easier. alttissmeters.com

• Brass body: The body is typically brass, for durability and corrosion resistance. alttissmeters.com

• Sealed against tampering: The meter is built to resist external tampering (e.g. via magnetic fields) and is sealed to preserve integrity. alttissmeters.com+2alttissmeters.com+2

• Crystal clear glass / protective glass cover: The dial is covered by clear glass to ensure readability and protection. alttissmeters.com

• Register orientation flexibility: The register can be rotated to a convenient reading angle. alttissmet

Accuracy & Error Limits (Class B)

For ClassB meters, the permissible errors and behavior typically follow:

• From Qmin (inclusive) up to Qt (exclusive) error up to 5%

• From Qt (inclusive) up to Qmax error up to 2% iotaflow.com+3dasmeshwatermeter.com+3krantiwatermeter.in+3

• The meter is designed to start rotating (i.e. detect flow) at a small threshold (minimum starting flow) that is lower than Qt.

• The meters accuracy is better in the higher flow range, less precise at very low flows.

Working Conditions & Constraints

• Suitable for cold potable water (temperature up to ~50C) alttissmeters.com+2alttissmeters.com+2

• Pressure losses should be small; excess pressure loss would reduce efficiency/accuracy.

• The meter should be installed in horizontal flow orientation, as multijet meters are optimized for horizontal mounting.

• The water should be relatively clean, free from large particulates or sediments, to avoid damaging the turbine.

• It should be installed with straight upstream/downstream pipe runs to reduce flow disturbances (common practice for flow meters).

Key Features & Advantages

• Dry Dial / Dry Register: The dial remains dry, which improves visibility and prevents damage from moisture or buildup. Alttiss Meters

• Tamper Protection: Sealed against external tampering. Alttiss Meters

• Brass Body: Offers good corrosion resistance and durability. Alttiss Meters

• IP68 Protection: Protection from dust and water ingress, enhancing lifespan in harsher environments. Alttiss Meters

• Rotatable Register: Ease of reading in different installation conditions. Alttiss Meters

Performance & Accuracy

• For flow rates from Qmin (30 L/h) up to Qt (120 L/h): the error tolerance is typically 5%.

• For flow rates from Qt up to Qmax (3,000 L/h): the error tolerance improves to 2%.

• These are typical of Class B multijet meters under IS / ISO standards. (Alttiss confirms conformity to those standards.) Alttiss Meters

What it is

The Alttiss Multijet Class-B meter is a domestic / light commercial type water meter that uses multijet technology and conforms to ISO 4064, IS 779:1994, and Class B accuracy standards. alttissmeters.com

• Multijet means the water entering the measuring chamber passes through several small jets or inlets, producing several streams that move the impeller / rotor. This distribution helps in achieving accuracy over a range of flows. dasmeshwatermeter.com+1

• Class B refers to a certain tolerance / accuracy class; typically 2% accuracy in the higher flow range (from transition to maximum), 5% in the lower flow (from minimum to transition), etc.