Process Control Instruments, Field Devices and Industrial Automation
ENDRESS+HAUSER CPS441D-72B1C (1)
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EH Tophit CPS441D Digital pH sensor with Memosens ISFET electrode for measurement in blocking media. Up to 145psi max pressure. IP68. ATEX, FM and CSA approvals.

Part# with Options:        CPS441D-72B1C
Price with Options:        Please Email us your request for quote   

Options:    

Shaft Length
(1) Shaft Length for EH CPS441D/471D/491D
Option
(2) Option for EH CPS441D
Approval
(3) Approval for EH CPS441D/471D/491D

  Availability 4 Days  ]

ISFET sensor with liquid KCl reference electrode for pH measurement in blocking media

Application

Special applications for:

  • Maximum measuring accuracy
  • Blocking media (pressurized)
  • High organic solvent contents
  • Low conductivities

With ATEX, FM and CSA approval for application in hazardous areas

Your benefits
  • Resistant to breaking
    • Sensor body made completely of PEEK (FDA compliant)
    • Direct installation into the process, reduces effort and costs for sampling and laboratory analysis
  • Re-fillable liquid KCl reference electrolyte
  • Application possible at low temperatures
    • Short response time
    • Constantly high accuracy
  • Sterilizable
  • Longer calibration intervals than glass electrodes
    • Lower hysteresis with alternating temperatures
    • Low measuring error after high-temperature loading
    • Almost no acid and alkaline errors
  • With built-in temperature sensor for effective temperature compensation
  • Ideal for CIP processes when combined with an automatic retractable assembly
Further benefits offered by Memosens technology
  • Maximum process safety through contactless inductive signal transmission
  • Data safety through digital data transmission
  • Easy handling thanks to storage of sensor-specific data in the sensor
  • Predictive maintenance possible thanks to registration of sensor load data in the sensor
Measuring principle

Ion-selective, or more generally ion-sensitive field effect transistors (ISFET) were developed in the 1970s as an alternative to the glass electrode for pH measurement.

Basics

Ion-selective field effect transistors use an MOS 1) transistor arrangement (see Fig 1) where the metallic gate (pos. 1) is not a control electrode. Instead, the medium (see Fig 2, pos. 3) in the ISFET is in direct contact with the gate isolator layer (pos. 2).Two strongly N-conducting areas are diffused in P-conducting substrate (see Fig 2, pos. 5) of the semiconductor material (Si). These N-conducting areas are current supplying ("Source", S) and current accepting ("Drain", D) electrodes. The metallic gate electrode (in case of the MOSFET) resp. the medium (in case of the ISFET) forms a capacitor with the substrate below. A potential difference between gate and substrate (U GS ) causes a higher electron density between "Source" and "Drain". A N-conducting channel (pos. 2) is formed, i.e. a drain current (ID) is induced.

With the ISFET, the medium is in direct contact with the gate isolator layer. Therefore, H + ions available in the medium, which are located in the medium / gate isolator boundary layer, create the electric field (gate potential). Depending on the effect described above, a N-conducting channel is formed and a current between "Source" and "Drain" is induced. Suitable sensor circuits use the dependence on the ion-selective gate potential to create an output signal proportional to the concentration of the ion type.

Measuring system

The complete measuring system comprises at least:

  • ISFET sensor Tophit
  • Measuring cable CPK12 (analog, with TOP68 connection) or CYK10 (digital, with Memosens)
  • Transmitter, e.g. Liquiline CM4x, Liquisys CPM223 (for panel mounting) or Liquisys CPM253 (field instrument) or Mycom CPM153.
  • Assembly
    • Immersion assembly, e.g. Dipfit CPA111
    • Flow assembly, e.g. Flowfit CPA250
    • Retractable assembly, e.g. Cleanfit CPA471 (CPA450 only with CPS471D, CPS491D or special versions CPS471-ESA and CPS491-ESA, --> Ordering information)
    • Fixed installation assembly, e.g. Unifit CPA442

There are additional accessories available depending on the application:

  • Topclean CPC30 or Topcal CPC310 automatic cleaning system
  • Extension cable, VBA, VBM or RM junction box

Measuring principle

ISFET sensor

Application

- Special applications with high requirements with regard to accuracy and speed - non-glass, break-proof - low temperatures - rapidly changing composition of media - highly clogging media - low conductivities

Characteristic

Ion sensitive field effect transistor (Isfet)-Technology.- Overhead installation- rapid response at low temperature.- lower amount of maintenance required than with glass.- 3A

Measurement range

pH 0-14

Measuring principle

- Ceramic diaphragm - liquid lead

Design

- All shaft lengths with temperature sensor

Material

Peek / metal oxide / ceramic / EPDM

Dimension

Diameter : 12mm (0.47 inch)Shaft length : 120,225,360,425mm (4.72/8.86/14.2/16.7 inch)

Process temperature

-15C ... 135C
(5F - 275F)

Process pressure

max. 10 bar/100C (145 psi/212F)

Temperature sensor

Optional with integrated Pt1000

Ex certification

ATEX
FM

Connection

Contactless, inductive, digitale connection head with Memosens-Technology

Ingres protection

IP68

Export Info
Made inGermany

  • ANALYSIS > TRANSMITTERS
    CM42-CAA000EAE00 EH Liquiline M CM42 Two-wire transmitter for Ex and non-Ex areas. One or two analog outputs. FOUNDATION Fieldbus, PROFIBUS PA and HART protocols. ATEX, FM, CSA, NEPSI and TIIS Approvals. ..

  • ANALYSIS > TRANSMITTERS
    CPM223-PR0005 EH Liquisys CPM223 pH and ORP compact 1 channel 4-wire transmitter for analog and digital glass and ISFET sensors. Simple menu and two-point calibration. Two-line display. IP65. CSA Approval. ..

  • ANALYSIS > TRANSMITTERS
    CPM253-PR0005 EH Liquisys CPM253 pH and ORP compact 1 channel 4-wire transmitter for analog and digital Memosens sensors. Simple menu and two-point calibration. Two-line display. PC/ABS housing. CSA Approval. ..

  • PH & ORP ANALIZERS > ASSEMBLY
    CPA111-00A EH Dipfit CPA111 Universal Immersion assembly for the applications in open and closed tanks. DN100 flange connection. Accepts up to 3 pH and ORP sensors. ..

  • PH & ORP ANALIZERS > ASSEMBLY
    CPA250-A00 EH Flowfit CPA250 Universal Flow assembly for the water and wastewater industry. Pipe installation. Accepts up to 3 pH and ORP sensors. NPT 1 Process Connection. ..

  • PH ANALIZERS > CABLES
    CYK10-A031 EH CYK10 Memosens Measuring Cable for Digital Sensors. IP68. FM, ATEX and CSA Approvals for Ex. ..

  • PH ELECTRODES > HAZARDOUS LOCATIONS
    CPS441-2ESC1 EH Tophit CPS441 analog pH sensor with ISFET electrode for measurement in blocking media. Up to 145psi max pressure. IP68. ATEX, FM and CSA approvals. ..

  • PH-ORP-OXYGEN ELECTRODES > ASSEMBLY
    CPA442-A1D1B11 EH Unifit CPA442 hygienic process assembly for food and beverage industries. Accepts 12mm Oxygen (O2), pH and ORP sensors. DN25 or DN50 Process Connection. ..


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