Brand: Sensus

Sensus 420 and 420PC Multijet Water Meter DN 15-40

Name: Sensus 420 / 420PC Multijet Water Meter – Datasheet & Quote
Brand: Sensus
SKU: 420 / 420PC

Description

The Sensus 420 and 420PC are multijet water meters for DN 15 to DN 40 at PN 16, with the 420 having a wet dial register and the 420PC a semi dry, protected dial. Both have a standard HRI interface for automatic meter reading and a robust brass body, and the data sheet stresses reliability in poor water quality, quiet operation and long-term stable performance. They suit residential and small commercial connections where the register must stay legible for years in all conditions.

Technical specifications

Parameter	Specification
Product	Sensus 420 wet dial and 420PC semi-dry protected dial multijet meter, HRI AMR interface
Nominal sizes	DN 15, 20, 25, 32, 40; PN 16 (MAP 16 bar)
Permanent flow Q3	2.5, 4, 6.3, 10, 16 m3/h
Ratio Q3/Q1	R160, R80 or R40 (420PC can be stamped in the lower R according to the approval)
Register	420: wet dial; 420PC: semi dry, protected dial; 5 drum display with 5 mm digits; register wheels for m3 and first pointer immersed in lubricant
Indication range and calibration	105 m3 indication range; 0.05 m3 calibration value
Temperature class	T50
Pressure	Working pressure 0.3 to 16 bar; pressure loss 0.63 bar
Flow profile sensitivity	U0, D0; installed horizontally (position H)
Environment	Closed spaces, -10 to 55 degC, mechanical class M2, electromagnetic class E1
Approval	MID DE-18-MI001-PTB004 for Q3 2.5 to 16; complies with ISO 4064, OIML R49 and PN-ISO 14154
AMR interface	Standard HRI interface, pulse weight from 1 litre; HRI sensor retrofittable (data unit or pulse unit)
Construction	Copper alloy body; thick (8 mm) polycarbonate window; sapphire-supported turbine; polymer internal parts; pipe strainer and seat filter
Options	Non return valve, HRI electronic sensor, connectors, customised marking (serial number, bar code, customer logo)

Performance and dimensions

DN	15	20	25	32	40
Q3 (m3/h)	2.5	4	6.3	10	16
Q4 (m3/h)	3.125	5	7.875	12.5	20
Q1 (l/h)	16	25	39	63	100
Q2 (l/h)	25	40	63	100	160
Length L (mm)	165	190	260	260	300
Width B (mm)	96	96	103	103	134
Connection	G3/4B	G1B	G1 1/4B	G1 1/2B	G2B

Register and tamper protection

On the 420 the register wheels for cubic metres and the first pointer are immersed in a lubricant, which prevents condensation and keeps the dial legible regardless of the water, so it is not affected by fogging or algae. The 420PC adds a protected dial for excellent legibility on all networks. The five-drum display has 5 mm digits on a white background and can be read from more than a metre away. The meter has no magnetic transmission and a magnet-free HRI interface, so a magnet placed nearby has no effect, and the 8 mm polycarbonate window and brass body protect against mechanical tampering.

Choosing the model and size

The turbine runs on sapphire bearings, the injection box finish prevents deposits and double filtration is provided by a pipe strainer and a seat filter. Install the meter horizontally at a low point of the pipeline with the flow arrow matching the flow, flush the pipework first and open the upstream valve slowly. Select the size from Q3, noting the connection threads from G3/4B to G2B and the lengths in the table; ratios are R160, R80 or R40 as approved, and the 420PC can be delivered stamped in the lower ratio on request. Confirm the HRI sensor type, optional non-return valve, customised marking and the approvals your supply authority requires; the listed approvals are the European MID and ISO ones.

How the Sensus 420 / 420PC works

Water enters the meter and strikes a turbine through several jets. The turbine turns at a speed in proportion to the flow. A gear train carries the turn to the register, which adds up the volume in cubic metres. A strainer in front of the turbine keeps larger particles out.

Where the Sensus 420 / 420PC is used

Residential water connections
Small commercial buildings
Apartment blocks
Small industrial sites
Automatic meter reading networks

Selection checklist for the Sensus 420 / 420PC

Nominal size, DN 15 to DN 40
Permanent flow Q3
Wet dial or semi-dry dial
Ratio R value
Installation position
Connection thread
HRI reading interface
Non-return valve option

Installation, commissioning and maintenance notes for the Sensus 420 / 420PC

Fit the meter horizontally in a pipe that stays full. Follow the flow arrow on the body. Flush the pipe before fitting to remove debris. Open the valves slowly to avoid shocks. Read the register and record the start value.

Requesting a quotation for the Sensus 420 / 420PC

Please send the pipe size, the flow range and the dial type needed. Seven Star LLC serves industrial customers in Oman and the GCC and replies with a quotation based on the information provided.

Sensus 420 / 420PC nominal sizes

The sizes are DN 15, 20, 25, 32 and 40.

Sensus 420 / 420PC pressure rating

The nominal pressure is PN 16.

Sensus 420 / 420PC permanent flow

Q3 runs from 2.5 to 16 m3/h.

Sensus 420 / 420PC dial types

The 420 has a wet dial and the 420PC has a semi-dry protected dial.

Sensus 420 / 420PC register

The register has a 5 drum display with 5 mm digits.

Sensus 420 / 420PC indication range

The indication range is 105 m3.

Sensus 420 / 420PC temperature class

The temperature class is T50.

Sensus 420 / 420PC body

The body is made of copper alloy.

Sensus 420 / 420PC window

The window is 8 mm thick polycarbonate.

Sensus 420 / 420PC AMR interface

A standard HRI interface supports automatic meter reading.

Sensus 420 / 420PC pressure loss

The pressure loss is 0.63 bar.

Water meter records for the Sensus 420 / 420PC

Record the serial number, the start reading and the date of each reading.

Choosing the right Sensus 420 / 420PC size

Choose the size from the real flow of the connection, not from the pipe size alone.

Documents and quotation

The linked file is the four-page Sensus 420 and 420PC data sheet LD 1270 INT (08.2023 edition). Before ordering confirm whether the wet dial 420 or the protected dial 420PC is required, the DN, lay length, ratio and HRI option. See also related flowmeters. Seven Star LLC, an independent supplier in Muscat, will prepare a quotation from your project requirements.

Datasheets & Documents

Datasheet Sensus 420 and 420PC data sheet (LD 1270 INT - 08.2023-0011) Download

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About brand

Sensus is a water and thermal energy metering manufacturer whose Sensus International business is based in Ludwigshafen am Rhein, Germany. Its range runs from static electromagnetic and ultrasonic meters such as iPERL and Cordonel to volumetric, multijet, turbine and compound meters, with SensusRF radio for fixed-network and walk-by or drive-by reading. Seven Star LLC, an independent supplier in Muscat, lists Sensus meters that are backed by the manufacturer data sheets.\n\n

Sensus meter technologies

\n\nSensus International states that it is one of the few global manufacturers offering both leading static metering technologies, electromagnetic and ultrasonic, alongside traditional mechanical meters. Piston meters such as the 620 and 640, the 420 multijet and the DomoJet single jet cover residential and sub-metering duty, while the WP-Dynamic turbine, the WPV-MS compound meter and the MeiStream Plus bulk meter serve larger flows.\n\n

What we need to quote a Sensus meter

\n\nSend the DN, connection or flange drilling, lay length, ratio, temperature class, the approvals your utility requires (MID, OIML R49, ISO 4064 or potable water approvals) and the radio protocol. Note that the North American iPERL+ is documented in US units and standards, separately from the international range.