HYDRUS 2.0 BULK ULTRASONIC METER
DIEHL Metering
APPLICATION
The HYDRUS 2.0 BULK is a static ultrasonic bulk water meter designed for applications of cold and hot water supply, enabling accurate measurement with long-term stability under difficult conditions. It is insensitive to air and sedimentation. Developed within the framework of the MID, it complies with European regulations and holds sanitary conformity certificates (AoC DEU, ACS, WRAS, and others). The integrated communication function supports meter data provision via mobile reading (walk-by/drive-by/passive drive-by) or fixed network (upgrade without on-site configuration). In combination with Diehl Metering's IZAR fixed network system, which offers high coverage and strong performance for hard-to-read locations, high data granularity and timeliness are maintained, making it a responsive infrastructure for immediate action.
FEATURES
- DN 50 to 200
- MID approved with dynamic range up to R 1000
- IP 68 suitable for outdoor installations
- Integrated communication based on OMS specification
- Wireless M-Bus for mobile reading in parallel to Fixed Network
- mioty® for Metering for extended radio range
- Wired M-Bus/Pulse/Pulse, wireless M-Bus, wireless M-Bus in combination with wired L-Bus/Pulse interface
- Display with error and alarm codes including leakage detection
- Battery lifetime up to 16 years
- UO / DO, no need for calming sections
TECHNICAL DATA
| Parameter | Value |
|---|---|
| Medium temperature range | +0.1 ... +50 (T30 / T50), +0.1 ... +90 (T90) °C |
| Accuracy | Class 2 acc. to ISO 4064:2014 / OIML R49:2013 |
| Ambient operating temperature | -10 ... +55 °C |
| Ambient storage temperature | -10 ... +70 °C (>35 °C max. 4 weeks) |
| Environmental class | O (Outdoors) |
| Mechanical environmental class | M2 |
| Electromagnetic environmental class | E2 |
| Flow profile sensitivity class | UO/DO (no calming sections required) |
| Installation position | Horizontal, inclined 45°, inclined 90°, vertical |
| Maximum admissible pressure | 16 bar |
| Minimum operating pressure | 0.3 bar |
| Pressure loss class | 0.16 bar |
| Power supply | 3.6 V lithium battery (D-cell) |
| Battery lifetime¹ | Up to 16 years |
| Communication interfaces | Optical, OMS Generation 3/4 wireless M-Bus 434/868 MHz, mioty® for Metering 434/868 MHz, M-Bus, L-Bus |
| Data storage | For errors, alarms and measuring values, data logging capabilities to record up to 1024 daily + 32 monthly values |
| Protection class | IP 68 |
¹ Depends on the sending interval of the radio telegram, the telegram length and the ambient temperature at the installation.
TECHNICAL DATA DISPLAY
Display indication: LCD, 9-digit, with additional symbols/display counter/unit.
- Units displayed DN50-80: Volume (m³ + 2 decimal places) and flow rate (m³/h + 3 decimal places).
- Units displayed DN100: Volume (m³ + 2 decimal places) and flow rate (m³/h + 2 decimal places).
- Units displayed DN125-200: Volume (m³ + 1 decimal place) and flow rate (m³/h + 2 decimal places).
- Values displayed: Includes display test, volume, battery lifetime, firmware version, software checksum, flow rate, current/continuous/historical error status, alarm status, high resolution volume, due date, due date volume, reverse volume, display counter, low battery indication, leakage indication, metrological log access, radio signal ON/OFF, and alarm indication, meter lock ON/OFF.
INTERFACES - OVERVIEW
- Optical: For switching the display loop and configuring/reading via IZAR@MOBILE.
- Wireless M-Bus: 434 or 868 MHz, OMS Generation 3/4. Standard for mobile reading (R3) sent every 14/64 seconds (default) and for fixed network (R4/R4+) sent every 5/15/60 minutes.
- mioty® for Metering: 434 or 868 MHz, OMS Generation 3/4. Standard for mobile reading (R3) sent every 64 seconds (default) and for fixed network (L1C) sent every 60 minutes.
- M-Bus: 2400 baud, cable length 5m, power supply via built-in battery. Combined with two Pulse outputs.
- L-Bus: In combination with radio, cable length 5m (only one interface communicating at the same time).
- Pulse (Open drain): Two Pulse outputs, or one Pulse and one L-Bus output. Pulse cable length 5m.
SECURITY
- Wireless M-Bus: OMS Generation 4 Profile B, individual keys (default) / OMS Generation 3 (selectable).
- mioty® for Metering: OMS Generation 4 Profile B, individual keys (default) / OMS Generation 3 (selectable).
PERFORMANCE DATA - COLD WATER (T30 / T50) HORIZONTAL
| Nominal diameter (DN) | Permanent flow rate (Q3) | Dynamic (Q3/Q1) | Overload flow rate (Q4) | Transitional flow rate (Q2) | Minimum flow rate (Q1) | Starting flow rate | Pressure loss at Q3 | Pressure loss at Q4 | Maximum flow rate² (Qhigh) | Flow coefficient (Kv) |
|---|---|---|---|---|---|---|---|---|---|---|
| mm | m³/h | R | m³/h | I/h | I/h | I/h | bar | bar | m³/h | m³/h |
| 50 | 25 | 800 | 31.25 | 50 | 31.25 | 15 | 0.16 | 0.25 | 54 | 63 |
| 65 | 40 | 800 | 50 | 80 | 50 | 27 | 0.15 | 0.23 | 87 | 105 |
| 80 | 63 | 800 | 78.75 | 126 | 78.75 | 35 | 0.16 | 0.25 | 134 | 158 |
| 100 | 100 | 800 | 125 | 200 | 125 | 45 | 0.13 | 0.2 | 250 | 280 |
| 125 | 160 | 800 | 200 | 320 | 200 | 70 | 0.15 | 0.23 | 400 | 420 |
| 150 | 250 | 800 | 312.50 | 500 | 312.50 | 140 | 0.11 | 0.18 | 625 | 747 |
| 200 | 400 | 800 | 500 | 800 | 500 | 200 | 0.12 | 0.19 | 1000 | 1140 |
² Outlet pressure minimum 3 bar, closed pipeline network.
PERFORMANCE DATA - HOT WATER (T90) HORIZONTAL
| Nominal diameter (DN) | Permanent flow rate (Q3) | Dynamic (Q3/Q1) | Overload flow rate (Q4) | Transitional flow rate (Q2) | Minimum flow rate (Q1) | Starting flow rate | Pressure loss at Q3 | Pressure loss at Q4 | Flow coefficient (Kv) |
|---|---|---|---|---|---|---|---|---|---|
| mm | m³/h | R | m³/h | I/h | I/h | I/h | bar | bar | m³/h |
| 50 | 25 | 400 | 31.25 | 100 | 63 | 15 | 0.16 | 0.25 | 63 |
| 65 | 40 | 400 | 50 | 160 | 100 | 27 | 0.15 | 0.23 | 105 |
| 80 | 63 | 400 | 78.75 | 250 | 160 | 35 | 0.16 | 0.25 | 158 |
| 100 | 100 | 400 | 125 | 400 | 250 | 45 | 0.13 | 0.2 | 280 |
| 125 | 160 | 400 | 200 | - | - | 70 | 0.15 | 0.23 | - |
| 150 | 250 | 400 | 312.50 | - | - | 140 | 0.11 | 0.18 | - |
| 200 | 400 | 400 | 500 | - | - | 200 | 0.12 | 0.19 | - |
APPROVAL
DN 50 - 200
- Approval: MID DE-19-MI001-PTB011
- Dynamic range (Q3/Q1): Up to 1000
- Standards: ISO 4064, OIML R49
- Sanitary conformity: AoC DEU, ACS, WRAS
DYNAMIC RANGE
DN 50-200
- Q3 25 ... 400 m³/h - T30: R 800
- Q3 25 ... 400 m³/h - T50: R 800H/250V
- Q3 25 ... 100 m³/h - T90: R 400H/160V
GRAPHS AND DIMENSIONS
Pressure Loss Graph
A logarithmic graph showing pressure loss in bars against flow rate in cubic meters per hour (m³/h). Multiple diagonal lines represent different nominal diameters (DN), illustrating how pressure loss increases with flow rate for each size.
Typical Error Graph
A graph illustrating the accuracy of the meter. The x-axis shows flow rate in liters per hour (l/h) on a logarithmic scale, and the y-axis shows accuracy in percentage (%). Several lines represent different nominal diameters (DN), with a highlighted red box indicating the acceptable accuracy range (typically between -1% and +2% for most of the flow range).
DIMENSIONS
Diagrams illustrating the physical dimensions of the HYDRUS 2.0 BULK meter. One shows a side profile with labels for overall length (L), counter length (L1), and height (H, H1, H2). Another shows a front view with flange details, indicating flange diameter (D), hole circle diameter (K), and screwhole diameter (D1).
| Nominal diameter (DN) | Overall length (L) | Flange diameter (D) | Hole circle diameter (K) | Number of screwholes | Screwhole diameter (D1) | Height (H) | Height (H1) | Height (H2) | Counter length (L1) | Meter width (B) | Counter width (B1) | Overall weight (approx.) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| mm | mm | mm | mm | pcs | mm | mm | mm | mm | mm | mm | mm | kg |
| 50 | 300 | 165 | 125 | 4 | 19 | 74 | 121 | 61 | 98 | 165 | 139 | 7 / 9 / 9 |
| 65 | 200/300³ | 185 | 145 | 4 | 19 | 87 | 143 | 61 | 98 | 185 | 139 | 9 / 9 |
| 80 | 300/350³ | 200 | 160 | 8 | 19 | 95 | 147 | 61 | 98 | 200 | 139 | 11 / 13 |
| 100 | 350⁴/360 | 220 | 180 | 8 | 19 | 105 | 165 | 61 | 98 | 220 | 139 | 14 / 15 |
| 125 | 250 | 250 | 210 | 8 | 19 | 120 | 177 | 61 | 98 | 250 | 139 | 17 / 19 / 20 |
| 150 | 300/500 | 285 | 240 | 8 | 23 | 135 | 185 | 61 | 98 | 285 | 139 | 23 |
| 200 | 350 | 340 | 295 | 12⁶ | 23 | 161 | 215 | 61 | 98 | 340 | 139 | 38 / 45 / 51 |
³ Optionally with rotatable flange
⁴ Rotatable flange
⁵ Flanges according to EN 1092, PN 10/16
⁶ 8 Screwholes for PN 10
METER BODY VARIANTS
a) The cold water meters come with an epoxy-coated cast iron housing as standard. ISO short length variants can optionally be manufactured with a stainless steel housing.
b) ISO long length meters with diameters up to DN 100 can optionally come with rotatable flanges.
c) Hot water meters are always provided with stainless steel housings (EN 1.4408, AISI 316).
REACH INFORMATION
Information pursuant to Article 33 (1) of Regulation (EC) No 1907/2006 of the European Parliament and of the Council of 18 December 2006:
This product series contains components with the following substances in a concentration of more than 0.1% weight by weight (w/w):
- Lead titanium zirconium oxide (CAS no.: 12626-81-2)
