The Hydrasonic S8 ultrasonic BTU meter is designed for measuring the energy consumption in heating/cooling application for billing purpose.
Its static ultrasonic technology is based on the measurement of the transit time. It offers benefits like easy battery & temperature sensor replacement, IP68 protection, M-Bus and Wireless M-Bus communication options.
General
| Application | - | Heating or bi-functional (heating/cooling) | Heat-transfer
fluid: glycol-free water |
| Approval | - | In compliance with MID-EN1434 |
| Accuracy class | - | Class 2 |
| Ambient temperature | °C | +5 ... +55 |
| Storage temperature | °C | +5 ... +55 | max. –20…+60 (max. 4 weeks) |
| Humidity | % | 95 maximum |
| Battery supply | - | 3.6 VDC |
| Temperature sensor type | - | PT1000 , 2-wires: Ø 5.2 mm |
| Cable length of temperature sensor | m | 3 |
| Test possibilities | - | via display |
| Volume measuring cycle | s | 2 |
| Temperature measuring cycle | s | 30 |
| Power calculation cycle | s | 2 |
Calculator
| Protection class | - | IP66 (Optional IP67) |
| Environmental class-mechanical | - | M1, M2 |
| Environmental class electromechanical | - | E1, E2 |
| Calculator | - | Removable, with 3m cable to flow sensor |
| Absolute temperature range | °C | +1…+90 (+150 optional) |
| Starting temperature difference ΔΘ | K | 0.125 |
| Min. temperature difference ΔΘmin | K | In compliance with MID |
| Max. temperature difference (heating) ΔΘmax | K | 147 (In compliance with MID) |
| Extensive readable data memory | - | Monthly for 18 months (hourly, daily, yearly optional)
values of energy, volume and error hours; additionally
event memory (error log |
| Interchangeable components | - | Battery (Standard) ; Temperature sensors (Optional) |
Flow Sensors
| Dynamic range (Qp/Qi) | - | 1:100 |
| Mounting position flow sensor | - | Any position, no straight run requirements |
| Temperature range (heating/ cooling) | °C | 2-87* |
| Protection class | - | IP68 (heating/cooling) |
| *150 °C optional | | |
Interfaces
| Optical | ZVEI interface, for communication and testing. M-Bus protocol |
| Display | LCD-8 digit |
| M-Bus | According to EN13757-3: 2013 |
| Wireless M-Bus | According to EN13757-4; 2013 |
Display
| Display indication | LCD-8 digit + special characters |
| Units | kWh - m³ - °C - m3 /h* |
| Total values | 99,999.999 |
| Values displayed (main loop) | Energy - Volume - Flow - Power - Temperature - Differential temperature -
Operating hours - Meter SN-Meter size-Meter time-Error Status - Display test |
| *MWh-GJ optional | |
M-Bus
| M-Bus | Auto baud detect (300 and 2,400 bauds); galvanically insulated |
| M-Bus cable | 24 AWG , 2 Core |
| Data transmission | Data reading via 2 non-polarized wire (1.5m) |
| Battery life-time | Up-to 12 years* |
| *Under standard conditions of use and temperature | |
Flow Sensor Technical Data
| Measuring Method | Ultrasonic; Time of Flight |
| Nominal Diameter | mm | DN50 | DN65 | DN80 | DN100 | DN125 | DN150 | DN200 | DN250 | DN300 | DN350 | DN400 | DN450 | DN500 |
| Nominal flow qp | m³/h | 15 | 25 | 40 | 60 | 100 | 150 | 250 | 400 | 600 | 750 | 900 | 1200 | 1500 |
| Minimum flow qi | m³/h | 0.3 | 0.5 | 0.8 | 1.2 | 2.0 | 3.0 | 5.0 | 8.0 | 12 | 15 | 18 | 24 | 30 |
| Maximum flow qs | m³/h | 30 | 50 | 80 | 120 | 200 | 300 | 500 | 800 | 1200 | 1500 | 1800 | 2400 | 3000 |
| Length | mm | 200 | 200 | 225 | 250 | 250 | 300 | 350 | 450 | 500 | 500 | 500 | 500 | 500 |
| Dynamic range Qp/Qi | - | 1:50 | 1:50 | 1:50 | 1:50 | 1:50 | 1:50 | 1:50 | 1:50 | 1:50 | 1:50 | 1:50 | 1:50 | 1:50 |
| Accuracy class (MID) | - | class 2 |
| Nominal pressure PN | Bar | 16 / 20(optional) |
| Pressure drop Δp at qp | Bar | <0.25 |
Dimensions
| Nominal diameter (DN) | Length L(mm) | Stainless Steel (SS) | Cast Iron(CI) | Stud Bolt | Bolt Holes |
| Width W(mm) | Height H(mm) | Width W(mm) | Height H(mm) |
| 50 | 200 | 165 | 180 | 165 | 190 | M16 | 4 |
| 65 | 200 | 182 | 197 | 185 | 203 | M16 | 4 |
| 80 | 225 | 197 | 209 | 184 | 220 | M16 | 8 |
| 100 | 250 | 218 | 229 | 205 | 229 | M16 | 8 |
| 125 | 250 | 245 | 260 | 230 | 245 | M16 | 8 |
| 150 | 300 | 283 | 295 | 260 | 265 | M20 | 8 |
| 200 | 350 | 335 | 340 | 320 | 320 | M20 | 12 |
| 250 | 450 | 405 | 405 | 405 | 405 | M24 | 12 |
| 300 | 500 | 460 | 460 | 460 | 460 | M24 | 12 |
| 350 | 500 | 520 | 520 | 520 | 520 | M24 | 16 |
| 400 | 500 | 580 | 580 | 580 | 580 | M27 | 16 |
| 450 | 500 | 640 | 640 | 640 | 640 | M27 | 20 |
| 500 | 500 | 715 | 715 | 715 | 715 | M30 | 20 |
