Comparison Apator Powogaz JS 4-02 Smart C Plus DN 20 vs Apator Powogaz JS 4-02 Smart Plus DN 20

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	Apator Powogaz JS 4-02 Smart C Plus DN 20	Apator Powogaz JS 4-02 Smart Plus DN 20
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Main	The Smart C+ water metre is manufactured as standard with a low eight-chamber drum metre (IP65), with SN+ anti-magnetic protection. Sealed counting mechanism (with increased tightness), resistant to fogging	The Smart+ water metre is manufactured as standard with a low eight-chamber drum metre (IP65), with SN+ anti-magnetic protection. Sealed counting mechanism (with increased tightness), resistant to fogging
Type	household	household
Water temperature	for cold water	for cold water
Principle of operation	mechanical	mechanical
Mechanical	vane-wheeled single jet dry	vane-wheeled single jet dry
Specs
Diameter (DN)	20 mm	20 mm
Max. pressure	1.6 MPa	1.6 MPa
Minimum water flow (Qmin)	0.03 m³/h	0.04 m³/h
Transitional water flow (Qt)		0.06 m³/h
Rated water flow (Qn)	4 m³/h	4 m³/h
Max. water flow (Qmax)	5 m³/h	5 m³/h
Max. water temperature (Tmax)	50 °C	50 °C
Counter capacity	99999 m³	99999 m³
Division value	0.0001 m³	0.0001 m³
Sensitivity threshold, less than	12 L/h	15 L/h
Mounting
Installation	horizontal / vertical	horizontal / vertical
Connection type	thread	thread
Threaded connection size	1 "	1 "
Dimensions	130x72 mm	130x72 mm
General specs
Rotating counter mechanism
Protection against external magnetic influence
Verification interval	4 years	4 years
Body material	brass	brass
Weight	0.6 kg	0.53 kg
Country of origin	Poland	Poland
Added to E-Catalog	march 2019	march 2019

Minimum water flow (Qmin)

Minimum water flow for this metre model.

The minimum flow rate is the smallest flow rate at which the counting mechanism can provide measurement with an acceptable error of ±5%. This deviation is higher than the counter error in the standard mode (from Qt to Qn, see below for details), it is considered undesirable, but generally acceptable. But when the flow rate drops below Qmin, the error increases to unacceptable values, and there is no question of acceptable measurement accuracy. So, ideally, it is worth choosing a metre in such a way that its Qmin is not higher than the water consumption at the minimum intensity of consumption. Detailed recommendations for estimating the actual water consumption for different water supply systems can be found in special sources.

Transitional water flow (Qt)

Transitional water consumption for water metre model.

The transitional flow rate is the flow rate at which the maximum measurement error changes — namely, decreases: in the range from Qmin (see above) to Qt it is ±5%, and at the Qt level and above it drops to ±2%. In other words, Qt is the smallest flow rate at which the device gives not just an acceptable, but a minimum error. Thus, the optimal consumption intensity for any metre is in the range between Qt and Qn (see below), and it is this range that is best to focus on when choosing.

Detailed methods and recommendations for estimating water consumption for a particular water supply system can be found in special sources.

Sensitivity threshold, less than

Sensitivity threshold for this water metre model.

The sensitivity threshold is the lowest flow rate at which the device begins to respond to the movement of water and record the flow; at a lower speed, the measuring mechanism simply does not distinguish between flow and still water. The lower this indicator, the less likely it is that, at low consumption, water will be consumed without accounting. In household models (see "Type") the sensitivity threshold does not exceed 40 L/h, there are also much lower figures — 10 L/h, or even 5 L/h. In industrial metres designed for large industries, there are values of hundreds of litres per hour.