Memosens COL37E

Summary

Product identification

• Product Name: Memosens COL37E
• Description: Agile, optical oxygen sensor for laboratory measurements and random sampling in the field.
• Technology: Digital with Memosens 2.0 technology.
• Document: TI01678C/07/EN/01.22-00

Application

Typical applications include measurements in surface water, wastewater, and process water.

Your benefits

• Optical low-maintenance Memosens oxygen sensor.
• Fast response time t98: < 20 s.
• Integrated temperature sensor for effective temperature compensation.
• Memosens technology guarantees reliable measured values.
• Internal storage of sensor data enables simple GLP.
• Suitable for use with Liquiline Mobile, Liquiline To Go, and Memobase Plus.

Other advantages provided by Memosens technology

• Maximum analysis safety.
• Data security thanks to digital data transmission.
• Very easy to use as sensor data saved in the sensor.

Function and system design

Measuring principle

The sensor utilizes luminescence quenching. Oxygen-sensitive molecules (markers) are integrated into an optically active layer. When illuminated with orange light pulses, these markers luminesce with dark-red light pulses. The decay time and intensity of the response signals are dependent on the oxygen content and partial pressure in the medium. Oxygen molecules "mask" the marker molecules, leading to shorter decay times and less intense signals. The sensor calculates the measurement result based on signal intensity and decay time using the Stern-Volmer equation.

Sensor structure

• Optics directed at the rear of a carrier.
• Luminescence layer, optical insulating layer, and cover layer applied on a carrier.
• Cover layer is in direct contact with the medium.

Measurement result

The sensor provides measured values for temperature and partial pressure, as well as a raw measured value corresponding to the luminescence decay time (approx. 14 μs in air, approx. 56 μs in oxygen-free media).

Measuring system

The measuring system consists of:

1. Transmitter (e.g., CML18)
2. Smartphone with Smartblue app (optional)
3. Memosens COL37E sensor

Communication and data processing

Digital laboratory sensors with Memosens technology must be connected to a handheld device with Memosens technology (e.g., CML18).

Digital laboratory sensors can store the following data:

• Manufacturer data
• Serial number
• Order code
• Date of manufacture
• Calibration data
• Calibration date
• Number of calibrations
• Serial number of the handheld device used for the last calibration or adjustment
• Application data
• Temperature application range
• Oxygen application range
• Date of initial commissioning

Input

Measured variables

• Dissolved oxygen [mg/l, µg/l, ppm, ppb, %SAT or hPa]
• Oxygen (gaseous) [hPa or %Vol]
• Temperature [˚C, ˚F]

Measuring ranges

• 0 to 200 % SAT (applies for 25 °C and 1013 hPa)
• Up to a maximum of 1000 hPa.

Note: Indicated measured errors are reached in the optimum measuring range.

Performance characteristics

Response time 1)

From air to nitrogen at reference operating conditions:

• t90: < 20 s
• t98: < 20 s

Reference operating conditions

• Reference temperature: 25 °C (77 °F)
• Reference pressure: 1013 hPa (15 psi)

Maximum measured error 2)

• ±1 % or ±8 µg/l (ppb) of the measured value (the higher value is relevant).

Environment

• Ambient temperature range: –5 to +60 ˚C (23 to 140 ˚F)
• Storage temperature range: -25 to 50 °C (-13 to 122 °F) at 95% relative humidity, non-condensing.
• Degree of protection: IP68, IP69

Process

• Process temperature range: –5 to +60 ˚C (23 to 140 ˚F)

Chemical resistance

• NOTICE: Halogen-containing solvents (dichloromethane, chloroform), ketones (e.g., acetone, pentanone), and toluene have a cross-sensitive effect and can lead to decreased measured values or complete sensor failure. Use the sensor only in media that are free from these substances.

Mechanical construction

• Weight: 0.1 kg (0.20 lbs)
• Materials:
  • Sensor shaft: Stainless steel 1.4435 (AISI 316L)
  • Seals/O-rings: EPDM
  • Spot cap: Stainless steel 1.4435 (AISI 316L)
  • Spot layer: Silicone
  • Temperature sensor: Pt1000 (Class A according to DIN IEC 60751)

Accessories

• Measuring cable: Memosens data cable CYK10
• Measuring cable: Memosens laboratory cable CYK20
• Zero-point gel: COY8 (for verification, zero point calibration, and adjustment)
• Transmitter: Liquiline Mobile CML18
• Software: Memobase Plus CYZ71D (PC software for laboratory calibration)
• Maintenance kit: Includes spot cap, O-ring mounting tool, maintenance instructions, calibration bottle, O-rings, and certificate.

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror