Multijet meter
MTWe - 868 MHz
Product categories
Water
with electronic register for warm water up to 90 °C - DN 15, 20, 25, 32, 40, 50
Water
Mechanical
Wireless
wM-Bus,
LoRaWAN
Smart Building
Your benefits
- 2 communication technologies in one meter (Dual mode)
Investment security and efficient meter reading all the time with fall back to wireless M-Bus if LoRaWAN is not accessible - Utility grade and sustainable technology (robust & high grade wear resistant materials with brass body):
Excellent measuring stability and reliability over meter lifetime and awareness of using a recyclable product - Plug & Play:
Easy and fast on-site installation with automatic radio activation (no programming required) - Performance driven design:
Range up to several km (LoRaWAN) or up to several hundred meters (wireless M-Bus) - depending on environment - Integrated monitoring of connectivity and reconnecting mechanism (LoRaWAN):
Robust operation with automatic repair options, e.g. due to gateway failures
Applications
- Residential consumption monitoring of water consumption within an entire building
Options
- Only LoRaWAN transmission mode
- Only Wireless M-Bus transmission mode
Properties
- Multijet impeller wheel, super dry-dial, magnetic coupling
- Maximum operating pressure 16 bar
- Maximum operating temperature 90 °C
- Horizontal or vertical installation (Vertical riser/down pipe)
- Inlet strainer
- Typical battery lifetime up to 10 years
- 18 monthly volume key date values
Conformity according to European Measuring Instruments (MID)- Radio transmission in license free 868 MHz frequency band
- Data transmission in accordance with LoRaWAN (v1.0.4) and wireless M-Bus acc. EN 13757-4 (OMS® Gen. 4, Issue 4.1.2) (Dual mode)
- Contactless NFC configuration and commissioning (tap and go) interface
- ---------------LoRaWAN---------------
- Data security via AES-128-bit end-to-end encryption over 2 independent security layers
- ADR (adaptive data rate) support gives higher transmission intervals with consistent battery life
- Real-time clock synchronization with LoRaWAN-Network - DeviceTimeReq
- ---------------Wireless M-Bus---------------
- AES128 encrypted wireless protocol security mode 5 (security profile A) or 7 (security profile B)
- Free route selection - no call-up required
- Migratable from drive-by system to fixed network application
Technical Data
| Execution | MTWe (horizontal) | MTW-VSe or -VFe (vertical)1) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal diameter | DN | mm | 15 | 20 | 25 | 25 | 32 | 40 | 50 | 20 | 25 | 32 | 40 |
| Nominal pressure | PN | bar | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Connection thread on meter | G…B | Inch | ¾ | 1 | 1¼ | 1¼ | 1½ | 2 | 2⅜ | 1 | 1¼ | 1½ | 2 |
| Connection thread on coupling | R… | Inch | ½ | ¾ | 1 | 1 | 1¼ | 1½ | 2 | ¾ | 1 | 1¼ | 1½ |
| Nominal flow rate | Q3 | m3/h | 2,5 | 4 | 6,3 | 10 | 10 | 16 | 25 | 4 | 6,3 | 10 | 16 |
| Overload flow rate2) | Q4 | m3/h | 3,125 | 5 | 7,875 | 12,5 | 12,5 | 20 | 31,25 | 5 | 7,875 | 12,5 | 20 |
| Transitional flow rate ± 3 % | Q2 | m3/h | 0,04 | 0,08 | 0,126 | 0,2 | 0,2 | 0,32 | 0,5 | 0,08 | 0,126 | 0,2 | 0,32 |
| Minimum flow rate ± 5 % | Q1 | m3/h | 0,025 | 0,05 | 0,079 | 0,125 | 0,125 | 0,2 | 0,313 | 0,05 | 0,079 | 0,125 | 0,2 |
| Max. register reading | m3 | 1'000'000 | 1'000'000 | ||||||||||
| Temperature range | max. | °C | 0,1…90 | 0,1…90 | 0,1…90 | 0,1…90 | 0,1…90 | 0,1…90 | 0,1…90 | 0,1…90 | 0,1…90 | 0,1…90 | 0,1…90 |
| Measuring range | R100 | R80 | R80 | R80 | R80 | R80 | R80 | R80 | R80 | R80 | R80 | ||
| Dimensions and weights | MTWe (horizontal) | MTW-VSe or -VFe (vertical)1) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Length without couplings | A | mm | 165 | 220 3) | 260 | 260 | 260 | 300 | 300 | 105 | 150 | 150 | 200 |
| Length with couplings | mm | 239 | 312 | 352 | 352 | 372 | 432 | 452 | 197 | 242 | 262 | 332 | |
| Height | B | mm | 119 | 125 | 135 | 135 | 135 | 160 | 174 | - | - | - | - |
| Height from pipe centre line | C | mm | 84 | 85 | 91 | 91 | 91 | 114 | 117 | - | - | - | - |
| Depth | D | mm | - | - | - | - | - | - | - | 148 | 169 | 183 | 226 |
| Depth from pipe centre line | E | mm | - | - | - | - | - | - | - | 130 | 143 | 156 | 190 |
| Installation depth from pipe centre line | W | mm | 48 | 48 | 50 | 50 | 50 | 68 | 76 | 48 | 49 | 51 | 70 |
| Height with open lid | G | mm | 167 | 173 | 183 | 183 | 183 | 208 | 222 | - | - | - | - |
| Weight without couplings | kg | 1,7 | 2,1 | 2,6 | 2,6 | 2,7 | 5,4 | 6,7 | - | - | - | - | |
| Weight without couplings MTW-VS | kg | - | - | - | - | - | - | - | 1,9 | 3,0 | 3,0 | 6,0 | |
| Weight without couplings MTW-VF | kg | - | - | - | - | - | - | - | 2.,0 | 3,4 | 3,7 | 7,3 | |
| Weight with couplings | kg | 1,9 | 2,3 | 3,0 | 3,0 | 3,3 | 6,4 | 8,7 | - | - | - | - | |
| Weight with couplings MTW-VS | kg | - | - | - | - | - | - | - | 2,1 | 3,4 | 3,6 | 7,0 | |
| Weight with couplings MTW-VF | kg | - | - | - | - | - | - | - | 2,2 | 3,8 | 4,3 | 8,3 | |
| Ambient conditions | |
|---|---|
| Ambient temperature | + 5 °C to + 55 °C |
| Transport & Storage temperature | - 20 °C to + 70 °C |
| Register protection class | IP67 |
| Environmental class | B |
| Electromagnetic environmental class | E1 |
| Power supply | |
|---|---|
| Lithium/Mangan battery (not replaceable) | 3 V DC |
| Typical battery lifetime (depending on environment and configuration conditions | Up to 10 years |
| Approval | MTW3e (horizontal) | MTW3-VSe or -VFe (vertical)1) |
|---|---|---|
| MI-001 No. CH-MI001-07005 | ■ | ■ |
| Certifications | MTW3e (horizontal) | MTW3-VSe or -VFe (vertical)1) |
|---|---|---|
| SVGW / KTW/BWGL | ■ | ■ |
| UBA Brass (DIN 50930-6) | ■ | ■ |
| LoRa Alliance Certification (1.0.4 spec.) | ■ | ■ |
1) -VS = Vertical riser / -VF = Vertical down pipe 2) Max. 1 h per 24 h, with total time of 100 h 3) Also supplied in length 190 mm
| Information | |
|---|---|
| EU-Reach Art. 33 / ChemV Art. 71 | Brass product contain lead > 0,1 % |
Measuring error curve
Typical Head Loss Curve
Dimension Diagram
Installation
| Pipeline: | horizontal |  |
| vertical |  | |
| Meter head: | upwards |  |
Installation Requirements
The meter must be installed so that the type plate is always
horizontally positioned, facing upwards (do not tilt).
Documentation: GWF water meters - BAdfei10122
Technische Daten
| Display | |
|---|---|
| LCD | 9 digits |
| Volume unit | m3 |
| Volume resolution | 0.001 m3 |
| Flow rate unit | m3/h or L/h |
| Test mode | T |
| Low battery Icon | see image 3) |
| Alarm Icon | see image 2) |
| Radio indicator (On/Off) and LoRaWAN connectivity status | see image 1) |
| Radio specifications | |
|---|---|
| Frequency band | 868 MHz |
| Transfer protocol (payload) | LoRaWAN: GWF specific Wireless M-Bus: Acc. EN 13757-4 (OMS® Gen. 4, Issue 4.1 .2) |
| Radiated power | max. 14 dBm (25 mW) |
| Class (LoRaWAN) | A |
| ADR (LoRaWAN) | Yes |
| Activation type (LoRaWAN) | OTAA |
| Mode (Wireless M-Bus) | C1, C2 |
| Modulation (Wireless M-Bus) | FSK |
| Information data package | LoRaWAN 1) | Wireless M-Bus 1) |
|---|---|---|
| DevEUI | 70B3D538700000AB | - |
| Meter manufacturer | GWF | GWF |
| Medium | Warm water | Warm water |
| Meter S/N | 23132356 | 23132356 |
| Absolute meter value | 359.768 m3 | 359.768 m3 |
| Absolute meter reading key date | - | 343.417 m3 |
| Date of key date reading | - | 31.03.2022 |
| Remaining battery life | Years | Days/Semester |
| Warnings | Meter alarms, Low Battery, Burst pipe, Potential leak, Backflow, No Usage, Max. flow rate exceeded, Min./Max. temperature | Meter alarms, Low Battery, Burst pipe, Potential leak, Backflow, No Usage, Max. flow rate exceeded, Min./Max. temperature |
1) Other protocols (e.g. Privacy telegram) on request