Hygienic pressure sensor

Pressure sensor with hygienic, flush-mounted metal sensor

Cerabar PMP23 - Replaces PMP135

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    • High reproducibility and long-term stability
    • Customized measuring ranges
    • FDA compliant fill oil

    Specs at a glance

    Product Gases, vapors, liquids and dust
    Output 4 to 20 mA
    Reference accuracy ±0.3 %
    Process temperature range –10 to +100 °C (+14 to +212 °F); +135 °C (+275 °F) for one hour maximum
    Measuring ranges

    From –400 to +400 mbar (–6 to +6 psi) to
    –1 to +40 bar (–15 to +600 psi)

    Cerabar PMP23

    Product / VersionPrice / pcs. in USDOrder code
    ApprovalElectrical ConnectionOutputProcess Connection1 to 34 to 1011+
    CSA C/US General PurposePlug M12, IP65/67 NEMA Type 4X Encl.4-20mATri-Clamp ISO2852 DN25-38 (1-1/2") DIN32676 DN25-38, EHEDG, 3A371.-345.-327.- PMP23-CA1MxxJ3CJ
    ISO288 G1395.-367.-347.- PMP23-CA1MxxJxxx
    DIN11851 / Clamp / Tri-Clamp / Varivent468.-435.-412.- PMP23-CA1MxxJxxx
    IO-Link; 4-20mATri-Clamp ISO2852 DN25-38 (1-1/2") DIN32676 DN25-38, EHEDG, 3A371.-345.-327.- PMP23-CA7MxxB3CJ
    ISO288 G1395.-367.-347.- PMP23-CA7MxxBxxx
    DIN11851 / Clamp / Tri-Clamp / Varivent468.-435.-412.- PMP23-CA7MxxBxxx
    Valve plug ISO4400 NPT1/2, IP65 NEMA Type 4X Encl.4-20mATri-Clamp ISO2852 DN25-38 (1-1/2") DIN32676 DN25-38, EHEDG, 3A371.-345.-327.- PMP23-CA1VxxJ3CJ
    ISO228 G1395.-367.-347.- PMP23-CA1VxxJxxx
    DIN11851 / Clamp / Tri-Clamp / Varivent468.-435.-412.- PMP23-CA1VxxJxxx
    Non-hazardous areaPlug M12, IP65/67 NEMA Type 4X Encl.4-20mATri-Clamp ISO2852 DN25-38 (1-1/2") DIN32676 DN25-38, EHEDG, 3A371.-345.-327.- PMP23-AA1MxxJ3CJ
    ISO228 G1395.-367.-347.- PMP23-AA1MxxJxxx
    DIN11851 / Clamp / Tri-Clamp / Varivent468.-435.-412.- PMP23-AA1MxxJxxx
    IO-Link; 4-20mATri-Clamp ISO2852 DN25-38 (1-1/2") DIN32676 DN25-38, EHEDG, 3A371.-345.-327.- PMP23-AA7MxxB3CJ
    ISO228 G1395.-367.-347.- PMP23-AA7MxxBxxx
    DIN11851 / Clamp / Tri-Clamp / Varivent468.-435.-412.- PMP23-AA7MxxBxxx
    Valve plug ISO4400 NPT1/2, IP65 NEMA Type 4X Encl.4-20mATri-Clamp ISO2852 DN25-38 (1-1/2") DIN32676 DN25-38, EHEDG, 3A371.-345.-327.- PMP23-AA1VxxJ3CJ
    ISO228 G1395.-367.-347.- PMP23-AA1VxxJxxx
    DIN11851 / Clamp / Tri-Clamp / Varivent468.-435.-412.- PMP23-AA1VxxJxxx


    Product / VersionPrice / pcs. in USDOrder code
    Weld-in adapter G1, 316L Flush mount process connection. Material: 316L. Usage: PMP23, PMP51, PMP135, PTP33B/PTP35. Correct installation only with dummy.59.44 52005087
    Weld-in adapter G1, d=60, 316L Flush mount process connection. Material: 316L. Seal: silicone O-ring. FDA, EHEDG, 3-A compliant. Usage: FMI51/FMI52, FTI51/FTI52, FTL20/FTL20H, FTL31/FTL33, FTL50/FTL50H/FTL51/FTL51C/FTL51H, FTL80/FTL81, FTL260, FTW23, FTW33, PMP23, PMP51, PMP135, PTP33B/PTP35, QMW43. Usage: TM401/TM411, TMR35.74.03 52001051
    M12-female plug connector, cable side M12 plug socket, cable side Self confectionery connection. Usage: FMB50/FMB51/FMB52/FMB53, FMB70, FTL31/FTL33, FTW23, FTW33,PMP11, PMP21, PMP51, PTC31B, PTP31B, QMW43.18.17 52006263
    M12-female plug connec., 90deg, 5m cable M12 plug socket, cable side. 5m cable PVC, Cu Sn/Ni lock. Usage: FMB50/FMB51/FMB52/FMB53, FTL31/FTL33, FTL51B, FTW23, FTW33, PMC11, PMC21, PMC51, PMP11, PMP21/PMP23, PMP51/PMP55, PTC31B, PTP31B/PTP33B, QMW43.14.16 52010285
    M12-female plug connec.,90deg,cable side Self confectionery connection. Usage: M12 plug socket, cable side.20.20 71114212
    Cable 4x0,34, box M12, 316L, 90o, L=5m M12x1 plug. 5m cable PVC, 316L lock. Especially for hygiene applications. Usage: FTL33, FTL50, FTL51B, FTL80/FTL81/FTL85, FTW23, FTW33, QMW43.40.64 52024216
    Display PHX20 Plug-on display 4-20mA, 4-digit red. Plug DIN43650, protection IP65. Free scaling of indication. Voltage drop <= 5V. Usage: PMC131, PMP11/PMP21/PMP23, PMP131/135.180.-167.-158.- 52022914

    Prices valid until 31.12.2020 in USD per unit (not including shipping and applicable sales tax). See
    Endress+Hauser Terms and Conditions

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  • Application

    The Cerabar is a pressure transducer for the measurement of absolute and gauge pressure in gases, vapors, liquids and dust for applications with hygienic requirements. The Cerabar can be used in versatile applications thanks to a wide range of approvals and process connections.


    The process pressure deflects the metal process isolating diaphragm of the sensor and a fill fluid transfers the pressure to a Wheatstone bridge (semiconductor technology). The pressure-dependent change in the bridge output voltage is measured and evaluated.

    Application example

    Hygienic pressure sensor PMP135 - Application example

    Pressure sensor Cerabar PMP23 4 to 20 mA analog output (a) with auxiliary power supply, such as RN221N or RMA42 (b) from E-direct

  • Technical data

    Output signal 4 to 20 mA (2-wire)
    IO-Link 4 to 20 mA (3- or 4-wire)
    Switching capacity – Switch status ON: Ia ≤ 250 mA
    – Switch status OFF: Ia ≤1 mA
    – Voltage drop PNP: ≤2 V
    Signal range
    4 to 20 mA
    3.8 to 20.5 mA
    Load 4 to 20 mA RLmax ≤ (UB – 6.5 V) / 22 mA 1)
    Signal on alarm
    4 to 20 mA
    max. alarm >21 mA;
    min. alarm current adjustable
    Dynamic behavior 4 to 20 mA: Time constant (T90) 15 ms
    IO-Link: Time constant (T90) 16 ms
    1) RLmax: maximum load resistance; UB: supply voltage
    Power supply
    Supply voltage 10 to 30 V DC
    Current consumption 4 to 20 mA: ≤26 mA
    IO-Link: max. ≤300 mA
    Degree of protection – Cable: IP66/68 NEMA Type 4X/6P
    – Plug M12 Plastic: IP65/67 NEMA Type 4X
    – Plug M12 Metal: IP66/69 NEMA Type 4X
    – Valve plug: IP65 NEMA Type 4X
    Influence of power
    ≤0.005% of URL/1 V
    Residual ripple ±5 %
    Performance characteristics
    Reference accuracy ±0.3 %
    Thermal change of
    the zerooutput and
    the output span
    <1 bar (15 psi): <1.2 %;
    ≥1 bar (15 psi): <1 %
    Long-term stability

    1 year: ±0.2 %;

    5 years: ±0.4 %;

    8 years: ±0.45 %

    Switch-on time ≤2 s
    Ambient temperature
    –40 to +85 °C (–40 to +185 °F)
    Devices for hazardous areas or with IO-Link: –40 to +70 °C (–40 to +158 °F)
    Storage temperature
    –40 to +85 °C (–40 to +185 °F)
    Climate class Class 4K4H
    – Interference emission as per EN 61326 equipment B
    – Interference immunity as per EN 61326 appendix A (industrial sector)
    – NAMUR recommendation EMC (NE21) (not for devices with IO-Link)
    Process temperature
    –10 to +100 °C (+14 to +212 °F)
    Sterilization in place (SIP) at +135°C (+275 °F) for a maximum of one hour
    Materials not in
    contact with process
    – Housing: Stainless steel 316L
    – Filling oil: Synthetic oil polyalphaolefin FDA 21 CFR 178.3620, NSF H1
    Materials in contact
    with process
    – Process connections: 316L
    – metal process isolating diaphragm: AISI 316L
    – TSE Certificate of Suitability for all device components in contact with the process
    Ex ATEX II 1/2G Ex ia IIC T4 Ga/Gb
    CSA C/US IS Cl. I Div. 1 Gr. A-D
    FM IS Cl. I, Div.1 Gr. A-D T4
    IEC Ex ia IIC T4 Ga/Gb
    NEPSI Ex ia IIC T4
    EAC Ex ia IIC T4 Ga/Gb
    3A, EHEDG, EC1935/2004
    Pressure Equipment Directive

    Dimensions in mm (inches)


    Hygienic pressure sensor PMP135 - Dimensions

    a) M12 plug, housing cap made of plastic

    b) M12 plug, housing cap made of metal

    c) Valve plug

    d) Cable


    Installation according to instruction manual

    Process connections with flush-mounted, metal process isolating diaphragm

    a) Thread ISO 228 G1" Metal joint

    b) Thread ISO 228 G1" O-ring seal

    c) Thread M24×1.5


    Hygienic connections

    a) DIN 11851 DN 25

    b) DIN 11851 DN 40

    c)DIN 11851 DN 50

    d) SMS 1½"

    e)Clamp ISO 2852 DN 22

    f) Tri-Clamp ISO 2852 DN 25 – DN 38

    g) Tri-Clamp ISO 2852 DN 40 – DN 51

    h) Varivent F pipe DN25-32

    i) Varivent N pipe DN40-162

    j) Universal adapter 44 mm

    Electrical connection


    Hygienic pressure sensor PMP135 - Connecting 1

    a) 4 to 20 mA output

    b) M12 plug

    c) Valve plug

    d) Cable

    e) Devices with IO-Link

    f) M12 plug


    1:   brown = L+
    2:   blue = L-
    3:   green/yellow = ground connection
    (a): reference air hose

  • More documents for PMP23
  • IO-Link

    Besides its general benefits, summarized below, using IO-Link point-to-point communication with our hygienic pressure sensor Cerabar PMP23 allows:

    • Setting up the measuring range
    • Setting up the analogue output and a switch output


    General benefits of IO-Link

    Digital measured values:

    • Faultless transmission (e.g. EMC caused)
    • No conversion, thus a higher total accuracy


    More data

    • Possibility to carry more values
    • Detailed fault information
    • Additional process information


    Central parameters storage

    • Possibility to load set up parameters from the master into a device
    • Configuration can be duplicated from one device to the next
    • Remote sensor maintenance
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