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Keller LEX1 Ei Intrinsically Safe Digital Manometer (400bar)

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  • Pressure range of 0 to 400bar, accuracy of ±0.05% FS, and resolution of 20mbar
  • Intrinsically safe with classification of Ex II 2 G and Ex ia IIC T6 Gb
  • IP65 ingress protection rating, battery life of 2000 hours
(Ex. VAT) £590.00 (Inc. VAT) £708.00

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  • Description

    Keller LEX1 Ei Intrinsically Safe Digital Manometer (400bar)

    The Keller LEX1 Ei Intrinsically Safe Digital Manometer has an absolute pressure measurement range of 0 to 400bar with an accuracy of ±0.05% FS and a resolution of 20mbar. It is suitable for specialist applications including calibration and laboratory use and takes measurements via a G ¼” male connector.

    The Keller LEX1 Ei is an intrinsically safe instrument and is therefore safe to use in hazardous environments where there is a risk of combustion. It has an intrinsically safe classification of zone 1: Ex II 2 G and Ex ia IIC T6 Gb and certification files PTB 05 ATEX 2012 X and IECEx PTB 13.0028 X.

    Pressure readings are available in a number of different units on the Keller LEX1 Ei’s clear digital screen. It has a digital calibration function with a zero point and end point whilst the min/max recording feature captures extreme values.

    The Keller LEX1 Ei is capable of communicating with a monitoring network over its RS485 Fischer connection, however a Keller K114A Cable Adaptor is needed for this function. Keller CCS30 software – available for free from the Keller website – can be used to coordinate the system with up to 128 instruments in a Keller-Bus protocol.

    The Keller Lex1 Ei has just two buttons, which makes operation very easy, and also boasts an IP65 rating and a 2000-hour battery life.

    Keller part number: 303030.2004

    Key Features

    • Intrinsically safe
    • Suitable for calibration
    • Suitable for laboratories
    • Range: 0 to 400bar
    • Accuracy: ±0.05% FS
    • Resolution: 20mbar
    • Digital calibration feature
    • Works in wider monitoring system
    • IP65 ingress protection rating
    • 2000-hour battery life
      ECO2 LEO1 LEO2 LEO3 LEO5 LEO Record LEX1
    -1 to 3bar
    -1 to 30bar
    0 to 100bar
    0 to 300bar
    0 to 400bar
    0 to 700bar
    0 to 1000bar
    Accuracy ±0.5% FS ±0.1% FS ±0.1% FS ±0.1% FS ±0.05% FS ±0.1% ±0.05% FS
    (at smallest range)
    10mbar 1mbar 1mbar 1mbar 1mbar 1mbar 0.1mbar
    Temperature range 0˚C to 50˚C
    Temperature accuracy ±1˚C
    Intrinsically safe
    Peak mode
    Pressure connector 7/16" UNF G 1/4" 7/16" UNF G 1/4" G 1/4" G 1/4" G 1/4"
    Analogue output
    Internal memory
    Data port RS485 Binder USB RS485 Fischer RS485 Fischer
    Compatible with
    Keller-Bus protocol
  • Specification

    Intrinsically Safe Categorisation

    • Classification: Zone 1: Ex II 2 G Ex ia IIC T6 Gb
    • Certification files: PTB 05 ATEX 2012 X and IECEx PTB 13.0028 X


    • Absolute pressure range: 0 to 400bar
    • Overpressure: 800bar
    • Resolution: 20mbar
    • Accuracy @ RT (20˚C to 25˚C): ≤±0.05% FS. Nonlinearity (BFSL), pressure hysteresis, non-repeatability, zero point, amplification.
    • Total error band (0˚C to 50˚C): ≤±0.05% FS. Max. deviation within the specified pressure and temperature range.
    • Long-term stability: ±0.1% FS. > 1 bar, per year under reference conditions, yearly recalibration recommended.
    • Long-term stability: ±0.1mbar. ≤ 1 bar, per year under reference conditions, yearly recalibration recommended.
    • Degree of dependency on location: <±1.5mbar. Calibrated in vertical installation position with pressure connection facing downwards.
    • Accuracy of temperature measurement: ±1˚C typ.
    • Pressure range reserve: ±10%

    Electrical Data

    • Battery: 3 V, type CR2430. LEX1 Ei only permitted for use in haz- ardous atmospheres when used with the Renata CR2430
    • Battery life: Approx. 2000 hours when used continuously
    • External power supply: 8...28 VDC
    • Overvoltage protection and reverse polarity of external power supply: ± 32 VDC
    • RS485 voltage insulation: -7...+12 VDC
    • GND case insulation: > 10 MΩ @ 50 VDC
    • External interface: RS485 half-duplex
    • Interface measuring rate: 30 measurements per second
    • Electrical connection: Fischer D 103 A054-130
    • CE conformity as per 2014/30/EU (EMC): EN 61000-6-1 to -6-4; EN 61326-1 / EN 61326-2-3

    Temperature Range

    • Compensated temperature range: 0...50 °C
    • Media temperature: 0...50 °C
    • Ambient temperature: 0...50 °C
    • Storage temperature: -20...70 °C


    • Dimensions/appearance: See Dimensions & options
    • Number of digits on LC display: 2 rows with 5 digits each
    • Display mode: Pressure + min/max or pressure + temperature
    • Measuring rate: 2 measurements per second
    • Configurable units of pressure: [bar], [mbar], [hPa], [kPa], [MPa], [PSI], [mH2O], [cmH2O], [inH2O], [ftH2O], [mmHg], [inHg], [kp/cm2]
    • Additional units of pressure: 5 user-defined units can be configured

    Mechanical data

    • Pressure connection: Stainless steel AISI 316L
    • Pressure transducer separating diaphragm: Stainless steel AISI 316L
    • Pressure transducer seal (internal): FKM (Viton® type A)
    • Pressure connection seal (external): FKM (Viton® type A)
    • Display housing: Faradex AS-1003
    • Oil filling sensor: Silicone oil
    • Pressure connection: G1/4, see Dimensions & options
    • Diameter x height x depth (approx.): 76 x 118 x 55 mm
    • Weight (approx.): 300 g
    • Protection: IP65
  • Product Documents

    Product Attachments

    View FileKeller LEX1 Datasheet    Size: (1.73 MB)
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