CLS50D EH | Alldatasheet
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Technical content
Digital sensor with Memosens protocol or analog sensor Application Indumax CLS50D or CLS50 sensor is particularly suitable for use in the chemical and process technology sectors. The six-decade measuring range and the excellent chemical resistance properties of the materials in contact with the medium (PFA or PEEK) make it possible to use this sensor in a wide range of applications, such as:
- Concentration measurement of acids and bases
- Quality monitoring of chemical products in tanks and pipes
- Phase separation of product/product mixtures The digital sensor CLS50D is used in conjunction with the Liquiline CM44x/R or Liquiline M CM42, while the analog sensor CLS50 is used with the Liquiline M CM42 or Liquisys CLM223/253. Your benefits
- High durability
- High chemical resistance thanks to PFA coating
- PEEK version for temperatures up to 180 °C (356 °F)
- Low risk of soiling
- Dirt-repellent PFA surface
- Large sensor opening
- Easy installation
- Can be installed in pipes ≥ DN 80
- Total cable length up to 55 m (180 ft)
- Large measuring range from 2 μS/cm to 2000 mS/cm
- Integrated, coated Pt 100 temperature sensor, error class A
- Ex approval Ex ia IIC T4/T6 Other advantages of Memosens technology
- Maximum process safety
- Data security thanks to digital data transmission
- Very easy to use as sensor data saved in the sensor
- Recording of sensor load data in the sensor enables predictive maintenance Products Solutions Services Technical Information Indumax CLS50D/CLS50 Inductive conductivity sensor for standard, Ex and high-temperature applications TI00182C/07/EN/20.23-00 71623762 2023-07-31
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Function and system design Measuring principle Inductive conductivity measurement An oscillator (1) generates an alternating magnetic field in the primary coil (5), which induces a current flow (4) in the medium. The strength of the current depends on the conductivity and thus on the ion concentration in the medium. The current flow in the medium, in turn, generates a magnetic field in the secondary coil (3). The resulting induced current is measured by the receiver (2) and used to determine the conductivity. 1 2 A0024926 Oscillator Receiver Secondary coil Current flow in the medium Primary coil Advantages of inductive conductivity measurement:
- No electrodes and therefore no polarization effects
- Accurate measurement in media with a high degree of pollution and a tendency to form buildup
- Complete galvanic isolation of the measurement and the medium Measuring system CLS50D A complete measuring system comprises:
- A CLS50D inductively measuring conductivity sensor with fixed cable
- A transmitter, e.g. Liquiline CM44x Optional:
- Weather protection for the field installation of the transmitter
- Assembly to install the sensor in vessels or pipes, e.g. CLA111 1 2 A0024929 1 Example of a measuring system
1 Liquiline CM44x transmitter
2 Protective cover
3 Pipe nozzle with flange DN50 PN16
4 CLS50D sensor, version with flange DN50 PN16 and fixed cable with M12 connector
5 Pipe
A complete measuring system comprises:
- A CLS50 inductively measuring conductivity sensor with fixed cable
- A transmitter, e.g. Liquiline M CM42 Optional:
- Weather protection for the field installation of the transmitter
- Assembly to install the sensor in vessels or pipes, e.g. CLA111 A0024930 2 Example of a measuring system
1 CLS50 sensor, version with lap joint flange and fixed cable with ferrules
2 Liquiline CM42 transmitter
3 Protective cover
4 Pipe
5 Pipe nozzle with flange connection
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Communication and data processing (only CLS50D) Communication with the transmitter Always connect digital sensors with Memosens technology to a transmitter with Memosens technology. Data transmission to a transmitter for analog sensors is not possible. Digital sensors can store measuring system data in the sensor. These include the following:
- Manufacturer data
- Serial number
- Order code
- Date of manufacture
- Calibration data
- Calibration date
- Cell constant
- Delta cell constant
- Number of calibrations
- Serial number of the transmitter used to perform the last calibration or adjustment
- Operating data
- Temperature application range
- Conductivity application range
- Date of initial commissioning
- Maximum temperature value
- Hours of operation at high temperatures Input Measured values • Conductivity
- Temperature Measuring ranges Conductivity 2 μS/cm to 2000 mS/cm (uncompensated) Temperature -20 to +180 °C (-4 to +350 °F) Cell constant k = 1.98 cm–1 Measuring frequency 2 kHz Temperature measurement CLS50D Pt1000 (Class A according to IEC 60751) CLS50 Pt100 (Class A according to IEC 60751)
Electrical connection The sensor is supplied with a fixed cable. The cable between the sensor and transmitter can be extended using the measuring cable CYK11 (CLS50D) or CLK6 (CLS50) (not applicable for use in hazardous environments). GY GY GN WH BN YE PK Shield Com A Com B MemosensU U Additional sensor supply A0017984 3 CYK11 for extension of CLS50D Total cable length (max.): 100 m (330 ft) WH RD Pt 100YE GN RD WH BU BN n.c. RD BU A0024937 4 CLK6 for extension of CLS50 Total cable length (max.): 55 m (180 ft) CLS50 only: The residual coupling of the sensor increases when the fixed cable is extended. Performance characteristics Conductivity response time t95 ≤ 2 s Temperature response time PEEK version: t90 ≤ 7 min PFA version: t90 ≤ 11 min Measured error -20 to 100 °C (-4 to 212 °F): ±(5 μS/cm + 0.5 % of reading) > 100 °C (212 °F): ±(10 μS/cm + 0.5 % of reading) Repeatability 0.2% of reading Linearity 1.9 % (only applies in the 1 to 20 mS/cm measuring range)
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Orientation ‣ When installing, align the sensor in such a way that the medium flows through the flow opening of the sensor in the direction of medium flow. The sensor head must be completely immersed in the medium. 1 2 a max. 100(3.94) A0036463 5 Sensor orientation, dimensions in mm (in)
1 Direction of medium flow
2 Minimum water level in the pipe
Installation factor In confined installation conditions, the conductivity measurement is affected by the pipe walls. The installation factor compensates for this effect. The transmitter corrects the cell constant by multiplying by the installation factor. The value of the installation factor depends on the diameter and the conductivity of the pipe nozzle as well as the sensor's distance to the wall. The installation factor f can be disregarded (f = 1.00) if the distance to the wall is sufficient (a > 15 mm (0.59"), from DN 80). If the distance to the wall is smaller, the installation factor increases for electrically insulating pipes (f > 1) and decreases for electrically conductive pipes (f < 1). It can be measured using calibration solutions, or a close approximation determined from the following diagram. a [inch] 0 5 10 15 20 25 25a [mm] 0 80 . 1 00 . 1 20 . 1 40 . f A0034874 6 Relationship between installation factor f and wall distance
1 Electrically conductive pipe wall
2 Electrically insulating pipe wall
The digital sensor has already been adjusted at the factory. Onsite compensation is not required. CLS50 To compensate residual coupling in the cable and between the two sensor coils, zero adjustment in air ("air set") must be performed before installing the sensor. Follow the instructions provided in the Operating Instructions of the transmitter used. Installation with flange The sensor is suitable for installation in T-pieces ≥ DN 80, with the outgoing diameter reduced to ≥ DN 50. LWARNING Leakage Risk of injury if medium escapes! ‣ Tighten sensor nut using a torque of 20 Nm. ‣ To avoid leakages, regularly check the tightness of the nut. Flange, not in contact with medium 1 2 A0024949 7 Fixed flange, not in contact with medium (for order option: "Process connection" = 5, 6, 7)
1 Flange (stainless steel)
2 Nut
3 Sealing disk (GYLON)
4 O-ring
5 Sensor
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Flange, in contact with medium 1 2 A0024953 8 Fixed flange, in contact with medium (for order option: "Process connection" = 3, 4, P)
1 O-ring
3 Flange (stainless steel)
4 Radial seal (only for version "Process connection" = P)
Lap joint flange, not in contact with medium 1 2 A0024954 9 Lap joint flange, not in contact with medium (for order option: "Process connection" = A, B, C)
1 Lap joint flange (PP-GF)
2 Nut (stainless steel)
3 Flange (PVDF)
10 Installation of sensor with assembly
1 CLA111 with suspension bracket
2 CLA111 with flange connection
3 CLA140 with flange connection
4 CYA112
Ambient temperature CLS50D CLS50 Storage temperature -20 to +80 °C (0 to +180 °F) Degree of protection IP 68 / NEMA type 6 (sensor in installed state with genuine seal) Process Process temperature CLS50D Sensor material CLS50D-1/2 CLS50D- 3/4/5/6/8 CLS50D-7 CLS50D-A/B/C CLS50D-**P Without flange DN50 PN16, ANSI 2" JIS Lap joint flange DN50 PN40 PEEK –20 to 125 °C (-4 to 260 °F) –20 to 125 °C (-4 to 260 °F) –20 to 125 °C (-4 to 260 °F) –20 to 125 °C (-4 to 260 °F) –20 to 125 °C (-4 to 260 °F) PFA –20 to 110 °C (-4 to 230 °F) –20 to 110 °C (-4 to 230 °F) –20 to 110 °C (-4 to 230 °F) –20 to 110 °C (-4 to 230 °F) n.a.
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CLS50-1/2 CLS50- 3/4/5/6/8 CLS50-7 CLS50-A/B/C CLS50-P Without flange DN50 PN10, ANSI 2" JIS Lap joint flange DN50 PN40 PEEK –20 to 180 °C (-4 to 360 °F) –20 to 180 °C (-4 to 360 °F) –20 to 180 °C (-4 to 360 °F) –20 to 125 °C (-4 to 260 °F) –20 to 125 °C (-4 to 260 °F) PFA –20 to 125 °C (-4 to 260 °F) –20 to 125 °C (-4 to 260 °F) –20 to 125 °C (-4 to 260 °F) –20 to 125 °C (-4 to 260 °F) n.a. Process pressure (absolute) Max. 41 bar (595 psi), depending on sensor version, → temperature-pressure chart Temperature-pressure chart CLS50D-*B/C/F (version with PEEK sensor material) –20 +20 125 [°C] [bar] [°F] [psi] 247 160 –4 257+68 110 230 +23 1006040 80 a T p (abs.) 305 b 41595 140 A0053010 11 Pressure-temperature ratings 1 (blue) version with flange EN 1092-1 DN50 PN40 (CLS50D-P) 2 (black) versions without flange (CLS50D-1/2) 3 (red) versions with flange DN50/ANSI 2" (CLS50D-3/4/5/6) 4 (black) versions with flange JIS (CLS50D-7) 5 (green) versions with lap joint flange (CLS50D-**A/B/C) a Temperature limit for versions in hazardous areas b Temperature limit for versions in non-hazardous areas
CLS50D-*D (version with PFA sensor material) –20 +20 125 1 2 [°C] [bar] [°F] [psi] 247 160 –4 257+68 110 230 +23 1006040 80 a T p (abs.) 305 b A0053008 12 Pressure-temperature ratings 1 (blue) version without flange (CLS50D-1) 2 (red) versions with flange DN50/ANSI 2" (CLS50D-3/4/5/6/8) 3 (black) versions with flange JIS (CLS50D-7) 4 (green) versions with lap joint flange (CLS50D-**A/B/C) a Temperature limit for versions in hazardous areas b Temperature limit for versions in non-hazardous areas
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CLS50-*B/C/F (version with PEEK sensor material) –20 +20 125 180 [°C] [°F]–4 257 356+68 +23 10060 140 16040 80 T a b [bar][psi] 247 160 p (abs.) 305 41595 140 A0053011 13 Pressure-temperature ratings 1 (blue) version with flange EN 1092-1 DN50 PN40 (CLS50-P) 2 (black) versions without flange (CLS50-1/2) 3 (red) versions with flange DN50/ANSI 2" (CLS50-3/4/5/6) 4 (gray) version with flange JIS (CLS50-7) 5 (green) versions with lap joint flange (CLS50-A/B/C) a Temperature limit for 1 and 5 and for all versions in hazardous areas b Temperature limit for 2, 3 and 4 in non-hazardous areas
CLS50-*D (version with PFA sensor material) –20 +20 125 180 [°C] [bar] [°F] [psi] 247 160 –4 257 356+68 +23 10060 140 16040 80 T p (abs.) 305 115 a, b A0053007 14 Pressure-temperature ratings 1 (blue) versions without flange or with flange DN50/ANSI 2" (CLS50-1/3/4/5/6/8) 2 (black) version with flange JIS (CLS50-7) 3 (green) versions with lap joint flange (CLS50-A/B/C) a Temperature limit for versions in hazardous areas b Temperature limit for versions in non-hazardous areas
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28 (1.10) /UNI2300 39 (1.54) /UNI2300 15.0 (0.59) /UNI2300 47.5 (1.87) SW 36 G3/4 95 (3.74) /UNI2300 23.3 (0.92) /UNI2300 49.9 (1.96) A0037977 15 Version with G¾ thread. Unit of measurement mm (in) * Dimension for PEEK version NPT 1" SW 46 35 (1.38) A0037978 16 Version, NPT 1" thread. Unit of measurement mm (in)
/UNI2300 23.3 (0.92) 27 (1.06) 242 (9.53) 98 (3.86) 120 (4.73) /UNI2300 165 (6.50) /UNI2300 47.5 (1.87) /UNI2300 15 (0.59) /UNI2300 125 (4.92)/UNI2300 18 (0.71) A0047510 17 Version, flange EN1092-1 DN50 PN16, 316L welded PFA sensor sealing plate. Unit of measurement mm (in) Weight Approx. 0.65 kg (1.43 lbs) Materials Sensor PEEK, PFA (depending on version) Sensor seal VITON, CHEMRAZ (depending on version) Radial seal 1) EPDM Process connections G¾ CLS50D-*1B/C**: PEEK GF30 CLS50D-*1D**: stainless steel (AISI 316Ti) CLS50-*1A*: stainless steel 1.4571 (AISI 316Ti) CLS50-*1B/C/1/2/3: PEEK GF30 CLS50-*1B/C5/6: stainless steel 1.4571 (AISI 316Ti) NPT 1" PEEK Fixed flange Stainless steel 1.4404 (AISI 316L) Gasket GYLON (PTFE ceramic-filled) Lap joint flange PP-GF Flange combined with lap joint flange PVDF 1) Only version with "process connection" = P
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Process connections • Thread G¾
- NPT 1" thread
- Lap joint flange EN 1092 DN50 PN10
- Lap joint flange ANSI 2" 150 lbs
- Lap joint flange JIS 10K 50A
- Flange EN 1092-1 DN50 PN16
- Flange EN 1092-1 DN50 PN40
- Flange ANSI 2" 300 lbs
- Flange JIS 10K 50A Flange dimensions a Ø k D b d2 a Ø k D b 1 2 A0024986 18 Flange dimensions
1 Lap joint flange (PVDF)
2 Fixed flange (stainless steel)
Lap joint flange DN50 PN10 ANSI 2" 150 lbs JIS 10K 50A D 165 165 152 Ø k 125 121 120 d2 4 x 18 8 x 19 4 x 19 b 18 18 18 a 78 78 78 Screws M16 M16 M16 Dimensions in mm Fixed flange DN50 PN16 DN50 PN40 ANSI 2" 300 lbs JIS 10K 50A D 165 165 165.1 155 Ø k 125 125 127 120 d2 4 x 18 4 x 18 8 x 19 4 x 19 b 18 20 22.2 16 a 27 27 27 27 Screws M16 M16 M16 M16
Chemical resistance Medium Concentration PEEK PFA CHEMRAZ VITON Sodium hydroxide solution NaOH 0 to 50 % 20 to 100 °C (68 to 212 °F) 20 to 50 °C (68 to 122 °F) 0 to 150 °C (32 to 302 °F) Not suitable Nitric acid HNO3 0 to 10 % 20 to 100 °C (68 to 212 °F) 20 to 80 °C (68 to 176 °F) 0 to 150 °C (32 to 302 °F) 0 to 120 °C (32 to 248 °F) 0 to 40 % 20 °C (68 °F) 20 to 60 °C (68 to 140 °F) 0 to 150 °C (32 to 302 °F) 0 to 120 °C (32 to 248 °F) Phosphoric acid H3PO4 0 to 80 % 20 to 100 °C (68 to 212 °F) 20 to 60 °C (68 to 140 °F) 0 to 150 °C (32 to 302 °F) 0 to 120 °C (32 to 248 °F) Sulfuric acid H2SO4 0 to 2.5 % 20 to 80 °C (68 to 176 °F) 20 to 100 °C (68 to 212 °F) 0 to 150 °C (32 to 302 °F) 0 to 120 °C (32 to 248 °F) 0 to 30 % 20 °C (68 °F) 20 to 100 °C (68 to 212 °F) 0 to 150 °C (32 to 302 °F) 0 to 120 °C (32 to 248 °F) Hydrochloric acid HCl 0 to 5 % 20 to 100 °C (68 to 212 °F) 20 to 80 °C (68 to 176 °F) 0 to 150 °C (32 to 302 °F) 0 to 120 °C (32 to 248 °F) 0 to 10 % 20 to 100 °C (68 to 212 °F) 20 to 80 °C (68 to 176 °F) 0 to 150 °C (32 to 302 °F) 0 to 120 °C (32 to 248 °F) Certificates and approvals Current certificates and approvals for the product are available at www.endress.com on the relevant product page: 1. Select the product using the filters and search field. 2. Open the product page. 3. Select Downloads. Hazardous area approvals CLS50D-BA** and CLS50-G* ATEX II 1G Ex ia IIC T4/T6 Ga CLS50D-BV** ATEX / NEPSI Ex ic IIC T3 T4/T6 Gc CLS50D-IA IECEx Ex ia IIC T4/T6 Ga CLS50-V* ATEX II 3G Ex ic IIC T4/T6 Gc + NEPSI Ex ic IIC T4/T6 Gc NEPSI Ex ia IIC T4/T6 Ga FM IS NI Cl.I Div.1&2,G. A-D CSA IS NI Cl.I Div.1&2,Gr. A-D CLS50D-JA** JPN Ex ia IIC T4 Ga CLS50-T* TIIS Ex ib IIC T4 Gb UK Ex II 1G Ex ia IIC T6...T4 Ga EAC Ex, 0Ex ia IIC T6/T4 Ga X Marine approvals A selection of the devices and sensors have type approval for marine applications, issued by the following classification societies: ABS (American Bureau of Shipping), BV (Bureau Veritas), DNV-GL (Det Norske Veritas-Germanischer Lloyd) and LR (Lloyd’s Register). Details of the order codes of the
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approved devices and sensors, and the installation and ambient conditions, are provided in the relevant certificates for marine applications on the product page on the Internet. Order information Product page www.endress.com/cls50d www.endress.com/cls50 Product Configurator 1. Configure: Click this button on the product page. 2. Select Extended selection. The Configurator opens in a separate window. 3. Configure the device according to your requirements by selecting the desired option for each feature. In this way, you receive a valid and complete order code for the device. 4. Accept: Add the configured product to the shopping cart. For many products, you also have the option of downloading CAD or 2D drawings of the selected product version. 5. CAD: Open this tab. The drawing window is displayed. You have a choice between different views. You can download these in selectable formats. Accessories The following are the most important accessories available at the time this documentation was issued. Listed accessories are technically compatible with the product in the instructions. 1. Application-specific restrictions of the product combination are possible. Ensure conformity of the measuring point to the application. This is the responsibility of the operator of the measuring point. 2. Pay attention to the information in the instructions for all products, particularly the technical data. 3. For accessories not listed here, please contact your Service or Sales Center. Measuring cable For CLS50D Memosens data cable CYK11
- Extension cable for digital sensors with Memosens protocol
- Product Configurator on the product page: www.endress.com/cyk11 Technical Information TI00118C For CLS50 Measuring cable CLK6
- Extension cable for inductive conductivity sensors, for extension via VBM junction box
- Sold by the meter, order number: 71183688 VBM
- Junction box for cable extension
- 10 terminal strips
- Cable entries: 2 x Pg 13.5 or 2 x NPT ½"
- Material: aluminum
- Degree of protection: IP 65
- Order numbers
- Cable entries Pg 13.5 : 50003987
- Cable entries NPT ½": 51500177 Assemblies Dipfit CLA111
- Immersion assembly for open and closed vessels with flange DN 100
- Product Configurator on the product page: www.products.endress.com/cla111 Technical Information TI00135C Dipfit CLA140
- For the CLS50/CLS50D inductive sensor
- Immersion assembly with flange connection for very demanding processes
- Product Configurator on the product page: www.products.endress.com/cla140 Technical Information TI00196C Flexdip CYA112
- Immersion assembly for water and wastewater
- Modular assembly system for sensors in open basins, channels and tanks
- Material: PVC or stainless steel
- Product Configurator on the product page: www.endress.com/cya112 Technical Information TI00432C Calibration solutions Conductivity calibration solutions CLY11 Precision solutions referenced to SRM (Standard Reference Material) by NIST for qualified calibration of conductivity measuring systems in accordance with ISO 9000
- CLY11-B, 149.6 μS/cm (reference temperature 25 °C (77 °F)), 500 ml (16.9 fl.oz) Order No. 50081903
- CLY11-C, 1.406 mS/cm (reference temperature 25 °C (77 °F)), 500 ml (16.9 fl.oz) Order No. 50081904
- CLY11-D, 12.64 mS/cm (reference temperature 25 °C (77 °F)), 500 ml (16.9 fl.oz) Order No. 50081905
- CLY11-E, 107.00 mS/cm (reference temperature 25 °C (77 °F)), 500 ml (16.9 fl.oz) Order No. 50081906 Technical Information TI00162C
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