Ultrasonic volume measuring device
ULTRAFLOW® 44
Product categories
ULTRAFLOW® 44 is a static flow sensor based on the ultrasonic measuring principle. It is used primarily as a sub assembly of a thermal energy meter in combination with the separate calculators MULTICAL® 603 or MULTICAL® 803 and a set of temperature sensor. ULTRAFLOW® 44 has been designed with particular focus on water resistance (IP68), the flow sensor withstands even temporary submersion (up to 2 months). ULTRAFLOW® 44 is thereby particularly suitable for district heating/cooling applications (main meters, transfer stations, etc.) in billing transactions and can be used in cooling or heat/cooling installations.
Heat / Cooling
Ultrasonic
Smart City
Smart Building
Your benefits
- Durable, wear-free ultrasonic volume measuring device:
High measurement stability and operational reliability - Compact design:
Requires little installation space on site - High resolution of pulse values:
Precise instantaneous values - CH refrigeration certification (METAS) incl. initial calibration:
Approved for use in commercial transactions
Applications
- Particularly suitable for district heating/cooling applications (main meters, transfer stations, etc.) in billing transactions
- Replacement of mechanical impeller heat meters
- Heat/cooling or pure cooling consumption measurement in building services engineering
- Can only be used with MULTICAL® series calculators
Options
- Pulse transmitter with its own power supply for cable lengths >10 m
Properties
- Nominal diameters:
- Combined heating/cooling: DN 15 to DN 125
- Cooling: DN 15 to DN 125 - Nominal flow rates qp 1,5 to qp 100
- Low pressure loss
- No moving parts
- Signal transmission to the computing unit and power supply to the volume measuring device via a 3-wire cable
- Medium temperature 2 to 130 °C (from 90 °C, a flange meter and the removal of the calculator are recommended)
- Type approval/certification:
- Heat:Conformity acc. European Measuring Instruments Directive (MID)
- Cold: Swiss certification (METAS) including initial calibration
Product information
Technical Data
| ULTRAFLOW® 44 Series (DN 15-50) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal flow rate | qp | m3/h | 1,5 | 1,5 | 2,5 | 3,5 | 6 | 6 | 6 | 10 | 10 | 15 |
| Nominal diameter | DN | mm | 15 | 20 | 20 | 25 | 25 | 25 | 32 | 40 | 40 | 50 |
| Connection thread on the meter | G...B | Inch | ¾ | 1 | 1 | 1¼ | 1¼ | flange | 1½ | 2 | flange | flange |
| Maximum flow rate | qs | m3/h | 3 | 3 | 5 | 7 | 12 | 12 | 12 | 20 | 20 | 30 |
| Minimum flow rate | qi | l/h | 15 | 15 | 25 | 35 | 60 | 60 | 60 | 100 | 100 | 150 |
| Starting value | l/h | 3 | 3 | 5 | 7 | 12 | 12 | 12 | 20 | 20 | 30 | |
| Kvs value 1) | m3/h | 4.9 | 4.9 | 8.2 | 13.4 | 24.5 | 24.5 | 24.5 | 40 | 40 | 40 | |
| Meter factor 2) | p/l | 100 | 100 | 60 | 50 | 25 | 25 | 25 | 15 | 15 | 10 | |
| Maximum pressure | PN | bar | 25 | |||||||||
| Standard measuring range | qp / qi | 1:100 | ||||||||||
| Protection class | IP68 | |||||||||||
1) q=kv x √∆p
2) The meter factor appears from the type label
| ULTRAFLOW® 44 Series (DN 25-125) | |||||||
|---|---|---|---|---|---|---|---|
| Nominal flow rate | qp | m3/h | 25 | 40 | 60 | 100 | 100 |
| Nominal diameter | DN | mm | 65 | 80 | 100 | 100 | 125 |
| Connection | flange | flange | flange | flange | flange | ||
| Maximum flow rate | qs | m3/h | 50 | 80 | 120 | 200 | 200 |
| Minimum flow rate | qi | m3/h | 0,25 | 0,4 | 0,6 | 1 | 1 |
| Starting value | l/h | 50 | 80 | 120 | 200 | 200 | |
| Kvs value 4) | m3/h | 102 | 179 | 373 | 373 | 373 | |
| Meter factor 3) | p/l | 6 | 5 | 2.5 | 1.5 | 1.5 | |
| Maximum pressure | PN | bar | 25 | ||||
| Standard measuring range | qp / qi | 1:100 | |||||
| Protection class | IP68 | ||||||
3) q=kv x √∆p
4) The meter factor appears from the type label
Pressure loss
The pressure loss in a flow sensor is stated as the maximum pressure loss at qp.
According to EN 1434, the maximum pressure loss must not exceed 0,25 bar.
Mechanical data
| Ultraflow® 44 | |
|---|---|
| Accuracy class | 2 and 3 |
| Electromagnetic environment | Fulfils EN 1434 class C, MID E1 and E2 |
| Mechanical environment | MID M1 and M2 |
| Ambient conditions | 5...55 °C, closed location (installation indoors) |
| Protection class | IP68 |
| Medium in flow sensor | Water – recommended water quality as in CEN TR 16911 and AGFW FW510 |
| Medium temperature5) | 2...130 °C or narrower range |
| Storage temperature (empty sensor) | -25...60 °C |
| Pressure stage | PN16/PN25, PS25 see marking |
| Straight inlet requirement | 0D (according to EN 1434) |
| Installation angle | Horizontally, vertically and at an angle |
5) At medium temperatures above 90°C, the use of flange meters is recommended.
At medium temperatures above 90 °C or below the ambient temperature, the calculator and Pulse Transmitter/Pulse Divider must not be mounted on the flow sensor. Instead wall mounting is recommended.
| Materials | |
|---|---|
| Wetted parts: | |
| Housing, thread | DZR brass (dezincification-resistant brass) CW511L with max 0.1% Pb, implemented in 2024 |
| Blind plug | DZR brass (dezincification resistant brass) CW510L with max 0.1% Pb, implemented in 2024 |
| Housing, flange | Stainless steel, W.no. 1.4308 |
| Transducer (membrane) | Stainless steel, W.no. 1.4404 |
| O-ring | Ethylene propylene (EPDM) |
| Reflector base/reflector | Thermoplastic, PESU 30 % GF and stainless steel, similar to AISI 304 or AISI 316 (qp 0.6...2.5 m³/h) Thermoplastic, PESU 30 % GF and stainless steel, similar to AISI 304 (qp 6 and 10 m³/h) Stainless steel, similar to AISI 304 or AISI 316 - (qp 3.5, 15...100 m³/h) |
| Measuring tube | Thermoplastic, PESU – only flow sensor type 65-4-XXHX-XXX/Thermoplastic, PESU 30% GF |
| Electronic housing: | |
| PCB box | Thermoplastic, inside - polyolefin, outside - polyamide |
| Base (flow sensor) | qp 1.5 - 2.5 Thermoplastic, PESU 30% GF qp ≥ 3.5 Thermoplastic PC 10% GF |
| Cover (flow sensor) | Thermoplastic, PC 10% GF |
| Coaxial cable | Copper cable with silicone jacket and inner fluoropolymer insulation |
| Connection cable | Silicone cable (3 x 0.25 mm²) |
Approved meter data
| Ultraflow® 44 | |
|---|---|
| heat meter | DK-0200-MI004-044 EU-Type Examination Certificate DK-0200-MID-D-001 MID-certified according to Module D |
| cooling meter | TS 27.02 014 (DANAK accreditation 268) |
| Standards and norms | EN 1434:2007/AC2007 EN 1434:2015+A1:2015 EN 1434:2022 WELMEC 7.2:2021 |
| EU directives | Low Voltage Directive Electromagnetic Compatibility Directive Pressurised Equipment Directive (DN50...DN125 category I) |
| EN 1434 designation | Environmental class C Fast response meter |
| MID mechanical environment | Class M1 and M2 |
| MID electromagnetic environment | Class E1 and E2 |
| MID climatic environment | 5...55 °C, condensing, closed location (indoors) |
| MID accuracy class | 2 and 3 |
Accuracy
| Ultraflow® 44 | |
|---|---|
| Class 3 | Ef = ±(3 + 0.05 qp/q), but not above ±5% |
| Class 2 | Ef = ±(2 + 0.02 qp/q), but not above ±5% |
| Typical 6) | Ef = ±(1 + 0.01 qp/q) |
6) Documented with DANAK-accredited certificate at flow qi, 0.1 qp and qp.
Flow sensor tolerances qp:qi 100:1 (qp 1,5 m³/h)
Dimensioned sketches
All ULTRAFLOW® 44 flow sensors include a separate electronics box, which contains the PCB. This electronics box is connected to the plastic casing on the respective meter housing with a coaxial cable with a length of l < 1.2 m. The plastic casing on the meter housing contains the transducers of the flow sensor. Flow sensors of size qp 1.5...10 m³/h have the provision for built-in temperature sensors (M10x1 connection).
ULTRAFLOW® 44 - PCB and cables
ULTRAFLOW® 44, G¾B und G1B
| ULTRAFLOW® 44, G¾B und G1B | |||||
|---|---|---|---|---|---|
| Nominal flow rate | qp | m3/h | 1,5 | 1,5 | 2,5 |
| Thread | G | Inch | G¾B | G1B | G1B |
| Total length | L | mm | 110 | 130 | 190 |
| Dimension A | A | mm | 12 | 22 | 52 |
| Dimension B1 | B1 | mm | 35 | 38 | 38 |
| Dimension B2 | B2 | mm | 32 | 32 | 38 |
| Dimension B3 | B3 | mm | 38 | 48 | 78 |
| Weight | app. kg | 0,6 | 0,7 | 0,9 | |
Including the electronics box and L = 2.5 m signal cable.
ULTRAFLOW® 44, G1¼B, G1½B and G2B
| ULTRAFLOW® 44, G1¼B, G1½B and G2B | ||||||
|---|---|---|---|---|---|---|
| Nominal flow rate | qp | m3/h | 3,5 | 6 | 6 | 10 |
| Thread | G | Inch | G1¼B | G1¼B | G1½B | G2B |
| Total length | L | mm | 260 | 260 | 260 | 300 |
| Dimension M | M | mm | L/2 | L/2 | L/2 | L/2 |
| Dimension H2 | H2 | mm | 88 | 88 | 88 | 88 |
| Dimension A | A | mm | 16 | 16 | 31 | 40.2 |
| Dimension B1 | B1 | mm | 51 | 53 | 60 | 55 |
| Dimension B2 | B2 | mm | 20 | 20 | 24 | 29 |
| Dimension H1 | H1 | mm | 41 | 41 | 41 | 41 |
| Weight | app. kg | 1.9 | 2.0 | 2.0 | 2.9 | |
Including the electronics box and 10 m signal cable.
ULTRAFLOW® 44, DN25, DN40 and DN50
| ULTRAFLOW® 44, DN25, DN40 and DN50 | |||||
|---|---|---|---|---|---|
| Nominal flow rate | qp | m3/h | 6 | 10 | 15 |
| Diameter | mm | DN25 | DN40 | DN50 | |
| Total length | L | mm | 260 | 300 | 270 |
| Total height | H | mm | 106 | 140 | 145 |
| Dimension M | M | mm | L/2 | L/2 | 155 |
| Dimension H1 | H1 | mm | 41 | 41 | 41 |
| Dimension H2 | H2 | mm | 88 | 88 | 88 |
| Dimension D | D | mm | 115 | 150 | 165 |
| Dimension K | K | mm | 85 | 110 | 125 |
| Bolts d2 | d2 | mm | 14 | 18 | 18 |
| Bolts Thread | DN | M12 | M16 | M16 | |
| Weight | app. kg | 4.5 | 7.4 | 8.5 | |
Including the electronics box and 10 m signal cable.
ULTRAFLOW® 44, DN65 to DN125
| ULTRAFLOW® 44, DN65 to DN125 | |||||||
|---|---|---|---|---|---|---|---|
| Nominal flow rate | qp | m3/h | 25 | 40 | 60 | 100 | 100 |
| Diameter | mm | DN65 | DN80 | DN100 | DN100 | DN125 | |
| Total length | L | mm | 300 | 300 | 360 | 360 | 350 |
| Total height | H | mm | 168 | 184 | 220 | 220 | 260 |
| Dimension M | M | mm | 170 | 170 | 210 | 210 | 212 |
| Dimension H1 | H1 | mm | 41 | 41 | 41 | 41 | 41 |
| Dimension H2 | H2 | mm | 88 | 88 | 88 | 88 | 88 |
| Dimension B1 | B1 | mm | H/2 | H/2 | H/2 | H/2 | H/2 |
| Dimension D | D | mm | 185 | 200 | 235 | 235 | 270 |
| Dimension k | k | mm | 145 | 160 | 190 | 190 | 220 |
| Bolts d2 | d2 | mm | 18 | 18 | 22 | 22 | 26 |
| Bolts Thread | M16 | M16 | M20 | M20 | M24 | ||
| Weight | app. kg | 13.5 | 17.1 | 22.0 | 22.0 | 28.5 | |
Including the electronics box and 10 m signal cable.
Installation note
Straight inlet
ULTRAFLOW® requires neither straight inlet nor outlet to meet the Measuring Instruments Directive (MID) 2014/32/EU, OIML R75:2002 and EN 1434. Only in case of heavy flow disturbances before the meter, a straight inlet section will be necessary. It is recommended to follow the guidelines in CEN CR 13582.
Operating pressure
To minimise the risk of measuring errors as a result of cavitation or air in the water, it is recommended to keep a sufficient static pressure at the flow sensor outlet of min. 1.5 bar (1.0 bar for qp 1.5 - 2.5) up to qp and min. 2.5 bar (2.0 bar for qp 1.5 - 2.5) at qs. This applies to temperatures up to approx. 80 °C. It is particularly recommended to follow this advice during meter testing. In absence of cavitation, the flow sensor is typically functioning at lower operating pressure. Furthermore, ULTRAFLOW® must not be exposed to lower pressure than the ambient pressure (vacuum). This minimises the risk of transducer damage.
ULTRAFLOW® 44 tolerates periodical submersion. This applies to the meter housing as well as the electronics (PCB) of ULTRAFLOW® 44. If ULTRAFLOW® 44 is flooded, the connected MULTICAL® must not be flooded. Furthermore, temperature sensors must also not be flooded and therefore must be mounted elsewhere in the installation.
| Minimum recommended distances (best practice) | |
|---|---|
| Inlet section | 5 x DN |
| Outlet section | 3 x DN |
Installation positions
| Pipeline: | horizontal |  |
| vertical |  | |
| diagonal |  | |
| Head of the meter | to the side |  |
| ULTRAFLOW® 44 DN 15 – DN 125: | - 45° |  |
Electrical connections
| ULTRAFLOW® 44 | ||
|---|---|---|
| ULTRAFLOW® 44 | → | MULTICAL® |
| Blue (ground) | → | 11 |
| Red (power supply) | → | 9 |
| Yellow (signal) | → | 10 |