BLD | Blood Leak Detector

Optical Clamp-On Sensor for Contactless Detection of Smallest Traces of Blood

Optical Blood Leak Detector BLD01Optical Sensor for Non-Invasive Blood Leak Detection BLD01Optical Blood Leak Detector BLD02
Optical Blood Leak Detector BLD01Optical Sensor for Non-Invasive Blood Leak Detection BLD01Optical Blood Leak Detector BLD02


  • Optical Sensor with Adapted Wavelength
  • Non-Invasive Measurement
  • No Wear and Tear
  • Highly Resistant to Ambient Light
  • Programming and Test Kit
  • Software Development According to IEC 62304:2006, Class C

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The optical sensor BLD detects non-invasively smallest amounts of blood in dialysates on transparent tubes. As the wavelength is adapted to the transmittance of blood, the international standard IEC 60601-2-16:2008 for medical electrical devices is fulfilled reliably. Hence, the sensor is able to detect even 0.04 percent of blood in an isotonic saline solution.

There are two configurations of the blood leak detector for different requirements available:

  • The BLD01 meets high safety standards and features a serial interface. With simple commands, the sensor can be tested and the sensitivity adjusted.
  • Hence, the BLD02 has been developed strictly according to the software requirements of the international standard IEC 62304:2006, class C and meets highest demands on patient safety and reliability.

As a clamp-on component the non-invasive sensor with remote electronics is suitable for all tasks that require the optical detection of transmission differences of liquids in transparent tubes. Due to the high sensitivity of the sensor it is even possible to recognize if a tube filled with a clear fluid runs empty. 

Certified according to ISO 13485, we support you with the documentation necessary for the approval of medical devices. In addition to our standard products for blood leak detection, we also manufacture customer-specific solutions

Customer Reviews

Jeff Poland, President and CEO at Century HLM, on our air bubble sensors:

“We started with SONOTEC's ABD05 series sensor. After our research and interview process SONOTEC had the only sensor capable of meeting 60601 3rd edition specifications for a fail-safe free hanging non-intrusive arterial line air detector sensor.” [Read More]

Jochen Hübner, R&D and Quality Management Representative at Herrmann Apparatebau GmbH, on our Air Bubble Sensors:

“When searching for a suitable sensor our engineers came across SONOTEC. We chose the air bubble detector ABD06 of the SONOCHECK-series – in a customized version. The small size and the approved safety functions were the main reasons that spoke for the sensor.” [Read More]

Technical Data

Measurement Principle

Optical,in transmission


Transparent plastic tubing

Outer Diameter

5.5 to 7.0 mm

Power Supply

+3.3 to +5.5 VDC
≤ 50 mA

Operating Temperature

5 to 50 °C

Response Time

100 ms


BLD02: Digital


Safety Requirements: IEC 60601-2-16:2008
EMC: IEC 60601-1-2:2007


Development According to IEC 62304:2006,
Safety Class C


  • Hemodialysis
  • Transmission Measurement at Tubes

Do you have any questions?

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+1 631 / 415 4758
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