Buyzenner multyjet wataer meter b class Service Provider, Trader and Supplier

What Class B Means

Under standards like ISO4064 / OIML R49 / MID etc., multijet water meters are classified by accuracy. Class B means a certain error tolerance, typically 2% in the normal/nominal to maximum flow range, and larger error (e.g. 5%) at very low flows (from minimum up to transitional). This is typical for domestic meters.

Class B often correlates with R160 or similar metrological class (saying how much ratio the meter can handle between minimum and maximum flow) in European/MID systems. Zenner often lists R160, R200 etc. zenneraquamet.com+2Brunata -

Typical Features of Zenner Multijet Meters (Domestic / Class B)

From Zenners product lines (MTKD, MNK, MTKDS etc.), here are the common specs and design features:

Feature	Description / Typical Spec
Measuring Principle	Multijet (multijet) impeller turbine type. Water enters via multiple jets to spin an internal rotor, then gears carry rotation to register. (Zenners MNK, MTKD etc.) zenneraquamet.com+2ZENNER International+2
Register / Dial	Usually wet dial or dry dial depending on model. Some have semidry or protected rollers. UVresistant transparent cover. Some are sealed (IP ratings) to protect from condensation / water ingress. ZENNER Connect+2zenneraquamet.com+2
Housing / Construction Material	Commonly brass bodies; some models with polymer / glassfiber reinforced plastic bodies (lighter weight) especially in smallsize meters. Register caps often made of UVresistant polymer. ZENNER Connect+2zenneraquamet.com+2
Size / Diameter	Typical sizes for domestic Class B multijet meters: DN15 (), DN20 (), DN25 (1); sometimes up to DN40 for larger domestic or small commercial. zenneraquamet.com+2Land and Water Technology+2
Flow Parameters	Nominal flow (Qn, Q3 in Zenner datasheets) typically around 2.5 m/h for certain models, or somewhat lower for smaller sizes. Minimum flow and transitional flow as per standard, error 2% above transitional etc. Land and Water Technology+2ZENNER Connect+2
Temperature & Pressure	Designed for cold potable water up to about 50C; maximum operating pressure often MAP 16 (i.e. 16 bar) for many models. ZENNER International+3ZENNER International+3zenneraquamet.com+3
Mounting / Orientation	Many Zenner models allow horizontal installation; some allow vertical or even inclined / ascending/descending pipe runs. zenneraquamet.com+2Land and Water Technology+2
Protection / Durability Features	Sealed registers (IP ratings e.g. IP65, IP68 for premium models); antimagnet or magnetic tamper protection; protected rollers; lightweight plastic covers, etc. zenneraquamet.com+2ZENNER Connect+2
Remote Read / AMR Options	Many models equipped or retrofittable with pulse outputs (reed switch), wirelessMBus, or LoRaWAN modules for automatic meter reading. ZENNER International+2zenneraquamet.com+2

What is a Multijet Class B Water Meter

A multijet meter uses several small jets of water (turbulent flow) to spin an impeller (vane wheel). The rotation is transmitted (often via a magnetic coupling) to a dry dial register that totals the volume. Only the vane wheel (and associated shaft/pivot) is in contact with water; other parts stay dry.
Class B refers to an accuracy class per ISO-4064 / IS-779:1994. It sets the permissible error limits over different flow ranges (e.g., minimumflow to transitional, transitional to maximum flow).

Key Features & Construction

From typical Zenner / Anand-Zenner / Indian manufacturers multijet Class B meters:

Body material: Usually brass (sometimes cast brass), sometimes with options for protected or coated bodies. anandasahi.com+2alttissmeters.com+2
Register: Dry dial, vacuum-sealed register to protect from condensation, tampering, frost, dirt. Often with magnetic shielding or coupling so register is isolated from water. alttissmeters.com+3dasmeshwatermeter.com+3lehryvalves.com+3
Flow orientation: These meters are generally designed for horizontal installation. Some models support various orientations (horizontal, inclined). lehryvalves.com+2flowmetermechanical.com+2
Temperature & Pressure Ratings: For cold water typically up to ~50C; pressure ratings up to ~16 bar (1.6 MPa) depending on model. Hot water versions (if offered) have higher temp ratings. alttissmeters.com+3icenta.co.uk+3zenneraquamet.com+3

Accuracy & Flow Ranges

According to ISO 4064 / IS standards and producer data, the operational / permissible error zones are generally:

Flow Range	Flow Symbol	Error Tolerance
Minimum flow up to transitional flow (Q1 Q < Qt)	Low flows	5% typically for multijet Class B meters dasmeshwatermeters.com+3jbwatermeters.com+3mtcin.com+3
Transitional flow to maximum flow (Qt Q Qmax)	Main / high flows	2% error tolerance jbwatermeters.com+2dasmeshwatermeters.com+2

Also:

Qmin: the lowest flow at which the meter begins to reliably record (i.e. starting flow). For many 15-50 mm sizes Qmin might be on the order of 30300 litres/hour, depending on size. dasmeshwatermeter.com+2dasmeshwatermeters.com+2
Qt (Transitional / mid-flow point): the point dividing lower (less accurate) flow region from main flow.
Qn or Q3 (Nominal flow): The designed continuous flow at which meter is most accurate / used commonly for sizing.
Qmax: Maximum continuous or short-term flow beyond which meter may be overloaded; also limits for head loss.

Example Specification Values (Typical Sizes)

Here are some example parameter values for multijet Class-B meters (domestic sizes, 15-50 mm) taken from manufacturer datasheets, to give you concrete idea:

Size (mm)	Qmax (L/hr)	Qn (Nominal) (L/hr)	Qt (L/hr)	Qmin (L/hr)	Accuracy from Qt-Qmax	Accuracy from Qmin-Qt
15 mm	~ 3,000 L/hr	~ 1,500 L/hr	~ 120 L/hr	(e.g.) ~30 L/hr	2%	5% dasmeshwatermeters.com+1
20 mm	~ 5,000 L/hr	~ 2,500 L/hr	~200 L/hr	~50 L/hr	2%dasmeshwatermeters.com