zenner multyjet wataer meter b class

zenner multyjet wataer meter b class Specification

Measurement Range
Q3/Q1: 80 (per IS:779/ISO 4064)

Humidity %
Up to 100% RH (Condensing)

Protection
IP68 (Water Resistant)

Pressure Range
Max. Working Pressure 16 bar

Capacity
Max Flow Rate Qmax 3 m3/h (15mm)

Flow Rate
Min 0.03 m3/h, Nominal 1.5 m3/h (15mm size)

Equipment Type
Multi Jet Water Meter

Sensor Type
Turbine (Mechanical, Multi Jet)

Connectivity Type
None (Optional Pulse Output)

Application Media
Cold Water

Temperature Range
0C to 45C

Resolution
0.00005 m3 (15mm size)

Diameter
15mm, 20mm, 25mm

Material
Body: Brass / Composite Polymer

Power Supply
Not Required (Mechanical Meter)

Accuracy
Class B as per IS-779/ISO 4064

Display Type
Analogue (Cyclometric Drum Counter)

Range
As per IS:779 / ISO 4064 Standard

Indicating Mechanism
Magnetic Coupling

Pulse Output (Optional)
Reed Switch

Anti Tamper Feature
Tamper-Proof Sealing

Installation Requirement
Pipe Inline, Flanged/Threaded Connection

Application
Residential & Commercial Water Measurement

Mounting Position
Horizontal & Vertical

Direction of Flow
Uni-Directional (Arrow Marked on Body)

Minimum Reading
0.00005 m3

Maximum Reading
99999 m3

Rated Pressure Loss
0.025 MPa

About zenner multyjet wataer meter b class

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

Reliable and Versatile Water Measurement

Zenner Multijet Water Meter B Class delivers dependable water measurement for residential and commercial applications. With compatibility for horizontal or vertical mounting and a wide operating range, it adapts seamlessly to various piping configurations. Its IP68 protection and tamper-proof sealing guarantee long-lasting performance even under challenging conditions.

Compliance and Accuracy You Can Trust

Manufactured to meet IS-779 and ISO 4064 standards, this multi jet meter ensures Class B accuracy throughout its operation range. The cyclometric drum counter provides clear analogue readings, supporting maximum, minimum, and precise incremental measurements. Choose the right diameter-15mm, 20mm, or 25mm-for optimal flow and accuracy.

FAQ's of zenner multyjet wataer meter b class:

Q: How is the Zenner Multijet Water Meter B Class installed?

A: The meter is designed for inline installation using flanged or threaded pipe connections. It accommodates both horizontal and vertical mounting positions, with an arrow on the body indicating the correct direction of flow.

Q: What media can be measured using this water meter?

A: This meter is suitable for measuring cold water in various residential and commercial environments, with a temperature operating range from 0C to 45C.

Q: What are the benefits of the anti-tamper feature on this water meter?

A: The anti-tamper sealing protects the meter from unauthorized access, ensuring that water consumption readings are accurate and reliable.

Q: When should the pulse output option (reed switch) be considered?

A: The optional reed switch for pulse output is recommended when remote monitoring or integration with building management systems is needed. It enables electronic tracking of water usage.

Q: How does the indicating mechanism function on this meter?

A: The meter utilizes a magnetic coupling mechanism to drive the cyclometric drum counter, ensuring precise analogue display of water consumption without electronic components.

Q: What pressures and flow rates can the Zenner Multijet Water Meter handle?

A: It supports a maximum working pressure of 16 bar, a minimum flow rate of 0.03 m3/h, and a maximum flow rate of 3 m3/h (for 15mm size), meeting a variety of residential and commercial needs.

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