Comparison EcoStar DN15 1/2 L110 E-C 2.5 cold vs Gidrotek E-T 1.6-U cold

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.

Nominal flow rate for this metre model.

It is the highest flow rate at which the device can work indefinitely (during the entire service life) without failures, malfunctions and exceeding the maximum allowable error (± 2%). For a short time, a higher flow rate is also allowed (for more details, see “Maximum water flow (Qmax)”), however, the regular mode is still the mode in which this rate does not exceed Qn. So this parameter is the main one when choosing a device. Ideally, the actual water flow should always be in the range between the nominal and transitional (see above) flow.