Sensus 620 Dry Dial Volumetric Water Meter

Name: Sensus 620 Dry Dial Volumetric Water Meter – Datasheet & Quote
Brand: Sensus
SKU: 620

The Sensus 620 is a volumetric (piston) water meter with a dry dial register for cold water from 0.1 to 50 degC, available in DN 15 to DN 40 at PN 16. Its piston measuring chamber is designed so that even small drops of water are counted, and the data sheet describes a small pressure drop, high resistance to impurities and quiet operation. It is the traditional choice for domestic and small commercial supply connections where accuracy at very low flow and tolerance of dirt in the water both matter.

Technical specifications

Parameter	Specification
Product	Sensus 620 volumetric (rotary piston) meter, dry dial
Nominal sizes	DN 15, 20, 25, 32, 40; PN 16
Permanent flow Q3	2.5, 4, 6.3, 10, 16 m3/h
Ratio Q3/Q1	R400 for DN 15 and 20, R315 for DN 25 and 32 (MID seal up to R315, Q3 2.5 up to R400)
Temperature	Cold water 0.1 to 50 degC
Pressure	PN 16; pressure loss class stated in the head loss curve
Register	Dry dial: 8 drums (5 for m3, 3 for litres) and 1 pointer, lowest resolution 0.05 litre; central leak indicator disc; plastic dial with wiper, rotatable 350 degrees; optional metal/glass register, IP68
Strainer	Tubular strainer on the inlet or seat strainer; patented elastic pivot lets particles pass
Options	HRI electronic sensor (pulse unit, data unit), connectors, non-return valve, plastic or metal/glass register
Type approval	MID 2014/32/EU: Q3 2.5 DE-07-MI001-PTB002; Q3 4 DE-07-MI001-PTB004; Q3 6.3 to 16 DE-15-MI001-PTB019; OIML R49:2013; EN 14154-4:2014; ISO 4064:2017
Drinking water compliance	KTW/DVGW (D), ACS (F), WRAS (UK), Hydrocheck (B), KIWA ATA (NL)

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)	6.25	10	20	31.75	50.79
Q2 (l/h)	10	16	32	50.79	81.27
Length L (mm)	170	190	260	260	300
Tail thread	G3/4B	G1B	G1 1/4B	G1 1/2B	G2B
Weight (kg)	1.0	1.6	3.7	3.8	5.0

Dry dial register and AMR readiness

The dial has eight drums, five for cubic metres and three for litres, with one pointer and a central disc whose rotation shows the passage of water, which can reveal a downstream leak. The plastic dial has a wiper for legibility, or a sealed metal and glass register that does not fog can be fitted, giving IP68. The register is prepared for AMR, so an HRI electronic sensor in the form of a pulse unit or data unit can be added, and Sensus lists connectors and a non-return valve as further options. All gears sit in the dry register, which removes any risk of blockage from suspended particles, and the tamper-proof design is intended for a long service life. The meter works in any installed position and the register can be rotated up to 350 degrees.

Selecting a size

Pick the size from the permanent flow Q3 and the thread: the tails are G3/4B on DN 15, G1B on DN 20, G1 1/4B on DN 25, G1 1/2B on DN 32 and G2B on DN 40, with several lay lengths for DN 15 to DN 25 as options. The table above gives Q1 and Q2 minimum and transitional flows for the highest ratio per size; the MID seal can be supplied with a ratio R up to 315, and up to 400 for Q3 2.5 as the sheet notes. The sheet’s head loss curve is useful for sizing against available pressure. Confirm the register type, the AMR option and the approvals your supply authority requires; the listed certificates are European.

Documents and quotation

The linked file is the four-page Sensus 620 data sheet LD 1622 INT (09.2021 edition); the installation guidelines are in Sensus’s separate Volumetric Meter Manual, which is not included here. Before ordering confirm the DN, length, thread, register type, HRI option and ratio required. See also related flowmeters. Seven Star LLC, an independent supplier in Muscat, will prepare a quotation from your project requirements.

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.

Frequently Asked Questions