- For continuous non-contact level measurement
- Suited to level measurement of various liquid and bulk-solid materials
- Outstanding contrast OLED display
- Easy adjustment without measured material
- Quick view measured values on the display
- Xi version for usage in explosive areas
- Current output (4 ... 20 mA) with HART communication protocol
The ULM® ultrasonic level meters are compact measurement devices including an electroacoustics converter, central processor unit and display module. Using the electroacoustics converter, the level meters transmit the sequence of ultrasonic pulses that spread towards the surface level. The converter recuperates refl ected acoustic waves that are subsequently processed in the electronic module. The intelligent evaluation block fi lters out interfering signals, compares the cleaned received signal with
the false refl ection map (e.g. from mixers, ladders, reinforcement etc.) and selects a suitable refl ection (echo). Based on the period during which the individual pulses spread towards the surface level and back and based on the measured temperature in the tank, the instant distance to the surface level is calculated. According to the level height, the level meter output is set and the measured value is displayed on the display.
The level meters are suited to level measurement of various liquid materials, sewerage waters, mash and paste materials, suspensions in closed or open vessels, sumps, reservoirs and open channels. In case the level of bulk-solid materials is measured, the measurement range is reduced. We recommend to consult the use with the manufacturer.
Features of variants
- ULM –70_ –02–I Measuring range from 0.15 m to 2 m, plastic PVDF transmitter, mechanical connection with thread G 1".
- ULM –70_–06–I Measuring range from 0.25 m to 6 m, plastic PVDF transmitter, mechanical connection with thread G 1 ½".
- ULM –70_–10–I Measuring range from 0.4 m to 10 m, plastic PVDF transmitter, mechanical connection with HDPE polyethylene fl ange (version "N") or aluminium alloy fl ange (version "Xi").
- ULM–70_–20–I Measuring range from 0.5 m to 20 m, plastic PVDF transmitter, mechanical connection with aluminium alloy fl ange.
Installation
Level meter is installed into the upper lid of the tank (vessel), using a fi xing nut or a fl ange.
If installed in an open channel (sumps, reservoirs, etc.), install the level meter as closest as you can to the maximum level expected.
The front of the level meter must be vertically to the measured level.
Foam on the level absorbs the acoustic wave refl ection which might cause malfunction of the level meter. If possible select the location where the foaming is as low as possible.
Protect the level meter against direct sunlight.
In the case of uncertainty we recommend to consult the application with the producer.
Range of application
For continuous non-contact level measurement of liquids (water solutions, sewerage water, etc.), mash and paste materials (sediments, sticks, resins etc.) in closed or open vessels, sumps, reservoirs and open channels. In case the level of bulk-solid materials is measured, the measurement range is reduced. We recommend to consult the use with the manufacturer.
Correct specification examples
- ULM–70N–02–I
- ULM–70Xi–06–I
- ULM–70N–10–I
- ULM–70Xi–20–I
Accessories
standard – included in the level meter price
- 1x Seal (only for ULM–70_–02–I, 06–I)
optional – for extra charge
- Stainless fi xing nut UM–G1'' (for ULM–70_–02–I)
- Stainless fi xing nut UM–G1 ½'' (for ULM–70_–06–I)
Safety, protection and compatibility
The level meter ULM–70 is equipped with protection against reverse polarity and output current overload.
Protection against dangerous contact is secured by low safety voltage that complies with EN 33 2000-4-41.
Electromagnetic compatibility according to EN 55022/B, EN 61326/Z1 and EN 61000-4-2 to 6.
Explosion proof of ULM–70Xi type complies with the following standards: EN 60079-0 : 2007; EN 60079-11 : 2007 ; EN 60079-26 : 2007 and examined by FTZÚ-AO 210 Ostrava - Radvanice certifi cate No.: FTZÚ 09 ATEX 0277X.
