Features:
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Ordinary Type R400 Flow Parameter Table (Flow Unit: m³/h) |
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Minimum Flow Q1 |
Transitional Flow Q2 |
Common Flow Q3 |
Overload Flow Q4 |
Q3/Q1 |
Pressure Loss Class |
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DN15 |
0.00625 |
0.01 |
2.5 |
3.125 |
400 |
△p40 |
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DN20 |
0.01 |
0.016 |
4 |
5 |
400 |
△p40 |
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DN25 |
0.01575 |
0.0252 |
6.3 |
7.875 |
400 |
△p63 |
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Ordinary Type R250 Flow Parameter Table (Flow Unit: m³/h) |
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Minimum Flow Q1 |
Transitional Flow Q2 |
Common Flow Q3 |
Overload Flow Q4 |
Q3/Q1 |
Pressure Loss Class |
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DN15 |
0.01 |
0.016 |
2.5 |
3.125 |
250 |
△p40 |
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DN20 |
0.016 |
0.0256 |
4 |
5 |
250 |
△p40 |
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DN25 |
0.0252 |
0.04032 |
6.3 |
7.875 |
250 |
△p63 |
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Performance |
Parameter |
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Accuracy Class |
Class 2 |
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Nominal Diameter |
DN15-DN25 |
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Turndown Ratio R |
R160/R250/R400 (ordinary type) |
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Maximum Allowable Working Pressure |
1.6MPa |
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Working Environment |
-25℃~55℃, <100%RH (beyond this range, specify when ordering) |
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Temperature Class |
T30, T50, default T30 |
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Upstream Flow Field Sensitivity Class |
U0 |
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Downstream Flow Field Sensitivity Class |
D0 |
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Climate and Mechanical Environmental Conditions |
O |
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Electromagnetic Compatibility Class |
E2 |
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Button |
Photosensitive button |
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Display |
LCD, 10-digit numbers + symbols |
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Display Content |
Cumulative flow (m³), instantaneous flow (m³/h), water temperature (℃), cumulative effective running time, date (year/month/day) clock (hour/minute/second), software version/meter ID, screen detection |
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Display Resolution |
Cumulative flow 0.0001m³, instantaneous flow 0.001m³/h, water temperature 0.01℃ (decimal places for cumulative flow and instantaneous flow can be customized) |
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Display Range |
0m³~1999999.999m³ |
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Data Communication |
Optical Interface |
Baud rate 2400bps, supports GB/T26831 (EN13757-3) |
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NB-IoT Network |
Narrowband Internet of Things (NB-IoT network), data reporting period 1 day (beyond range, specify when ordering) |
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Data Communication |
NB-IoT Network |
1. Cumulative flow, cumulative running time and maximum flow stored monthly for the most recent 24 months. |
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2. The most recent 730 daily frozen cumulative volumes, cumulative running time and diagnostic codes. |
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3. Reporting history data for at least the most recent 1 month. |
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4. The most recent 60 reporting logs. |
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5. The most recent 100 alarm records. |
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6. Data can be saved for 100 years after power failure |
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Operating Power |
Battery powered DC3.6V (continuous working life more than 10 years) Note 1: Weak signal, data retransmission, high alarm frequency will shorten battery life. |
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Pulse Output |
Passive pulse output (external voltage requirement 3V < VDC < 40V, Imax: 25mA, pulse equivalent: 1L, 10L, 100L; pulse width ≤100ms. Non-standard output port, if needed, specify when ordering. |
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Protection Rating |
IP68 |
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Storage Temperature |
-25℃~55℃ |
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Meter Installation Position |
Water supply pipe section without air bubble accumulation |
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Installation Method |
Horizontal/Vertical |
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