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Keller LEX1 Ei Intrinsically Safe Digital Manometer (300bar)

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  • Certified as intrinsically safe for use in hazardous ATEX environments
  • Measure pressure up to 300bar with ±0.05% FS accuracy and 10mbar resolution
  • G ¼” pressure connector and piezoresistive transducer in oil-filled metal casing
(Ex. VAT) £590.00 (Inc. VAT) £708.00

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  • Description

    Keller LEX1 Ei Intrinsically Safe Digital Manometer (300bar)

    With an absolute pressure measurement range of 0 to 300bar, the Keller LEX1 Ei Intrinsically Safe Digital Manometer is a versatile instrument that can be used for calibration and laboratory applications. The piezoresistive pressure transducer gives an accuracy of ±0.05% FS and a resolution of 10mbar whilst a G1/4” male connector is used to access the system under test.

    As an intrinsically safe pressure meter, the Keller LEX1 Ei is suitable for measuring pressure in hazardous environments where there is a risk of explosions. It has a classification of zone 1: Ex II 2 G and Ex ia IIC T6 Gb with certification files PTB 05 ATEX 2012 X and IECEx PTB 13.0028 X.

    The Keller LEX1 Ei shows readings in number of different units of pressure on its clear digital display. It boasts a min/max recording feature alongside a zero function that allows relative measurement. To help ensure accuracy, there is a digital calibration function with a zero point and end point.

    The Keller LEX1 Ei can work as part of a wider monitoring system thanks to its RS485 Fischer connection. When linked up to a Keller-Bus protocol (a Keller K114A Cable Adaptor is required), the pressure gauge can work with 127 other temperature/pressure instruments to monitor a system. Keller CCS30 software can be downloaded for free from the Keller website to coordinate the protocol.

    The Keller LEX1 Ei is operated using just two buttons and it has an IP65 ingress protection rating for tricky environments. The battery lasts for 2000 hours.

    Keller part number: 303030.2003

    Key Features

    • Intrinsically safe for ATEX environments
    • Oil-filled metal casing and piezoresistive transducer
    • Measurement range: 0 to 300bar
    • Accuracy: ±0.05% FS
    • Resolution: 10mbar
    • G ¼” male pressure connector
    • Suitable for specialist industries
      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 300bar
    • Overpressure: 600bar
    • Resolution: 10mbar
    • 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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