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Keller LEX1 Ei Intrinsically Safe Digital Manometer (30bar)

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  • An intrinsically safe manometer for dangerous ATEX environments
  • Measurement range up to 30bar with accuracy of ±0.05% FS and 1mbar resolution
  • Works as part of a Keller-Bus protocol monitoring system
(Ex. VAT) £590.00 (Inc. VAT) £708.00

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  • Description

    Keller LEX1 Ei Intrinsically Safe Digital Manometer (30bar)

    The Keller LEX1 Ei Intrinsically Safe Digital Manometer has a relative measurement range of -1bar to 30bar and an absolute pressure range of 0bar to 31bar. Pressure readings – taken by a piezoresistive transducer in oil-filled housing – are accurate to ±0.05% and have a resolution of 1mbar. A G ¼” male connector is used to connect to the system under observation.

    The Keller LEX1 Ei is an intrinsically safe pressure gauge which means that it is suitable for use in hazardous environments where there is a risk of explosion. It is classified as as zone 1: Ex II 2 G and Ex ia IIC T6 Gb and has the following certification files: PTB 05 ATEX 2012 X and IECEx PTB 13.0028 X.

    A number of different pressure units are available on the Keller LEX1 Ei and readings are displayed on the clear digital screen. There are additional features such as the digital calibration with zero and end points, relative measurements via a zero function, and min/max recording.

    The Keller LEX1 Ei has an RS485 Fischer data connection that allows it form part of a Keller-Bus monitoring protocol with up to 127 instruments. An optional Keller K114A Cable Adaptor is needed to enable this feature but free Keller CCS30 software is available from the Keller website.

    The two-button operation system of the Keller LEX1 makes it very easy to use and further practicality is added by the 2000-hour battery life. The gauge also has an IP65 ingress protection rating.

    Keller part number: 303030.2002

    Key Features

    • Intrinsically safe manometer
    • Piezoresistive pressure transducer
    • Oil-filled metallic casing
    • Relative pressure: -1bar to 30bar
    • Absolute pressure: 0bar to 31bar
    • Accuracy: ±0.05% FS
    • Resolution: 1mbar
    • G ¼” male connection
    • Specialist applications
    • Keller-Bus protocol monitoring system
      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 31bar
    • Differential pressure range: -1 to 31bar
    • Overpressure: 90bar
    • Resolution: 1mbar
    • 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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