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Keller LEX1 Digital Precision Manometer (3bar)

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  • High-precision (0.1mbar), high-accuracy (±0.05%) measurement up to 3bar
  • Suitable for use in laboratories, calibration facilities and specialist industries
  • Forms part of a Keller-Bus pressure & temperature monitoring system
(Ex. VAT) £600.00 (Inc. VAT) £720.00

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  • Description

    Keller LEX1 Digital Precision Manometer (3bar)

    The Keller LEX1 Digital Precision Manometer is a useful industrial pressure gauge with an oil-surrounded piezoresistive transducer that can measure absolute pressure from 0 to 2bar and relative pressure from -1 to 3bar with an accuracy of ±0.05% FS and a resolution of 0.1mbar. It takes measurements via a G ¼” male connector. It is suitable for applications including laboratory use, calibration and certain industrial uses.

    The clear digital screen on the Keller LEX1 shows readings in a number of different units. It has a zero function for relative measurement and a min/max display which is easy to rest as required. Digital calibration with a zero point and end point can be used to help safeguard accuracy.

    The Keller LEX1 can be connected to a recording system via the RS485 Fischer connection and an optional Keller K114A Cable Adaptor. As part of a Keller-Bus protocol – coordinated with a free CCS30 software package from the Keller website – the gauge can work with up to 127 other instruments to carry out extensive monitoring.

    Two-button operation makes the Keller LEX1 very simple to use despite its complex functionality and it has an IP65 ingress protection rating. It has a 2000-hour battery life and can also be powered from an external power supply.

    Keller part number: 303030.0001

    Key Features

    • Piezoresistive transducer in oil-filled housing
    • Absolute pressure range: 0 to 2bar
    • Differential pressure range: -1 to 3bar
    • Accuracy: ±0.05% FS
    • Resolution: 0.1mbar
    • G ¼” male connector
    • Laboratory, calibration, industrial use
    • Multiple pressure units
    • Digital calibration function
    • Min/max and zero functions
    • Works as part of Keller-Bus 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


    • Absolute pressure range: 0 to 2bar
    • Differential pressure range: -1 to 3bar
    • Overpressure: 6bar
    • Resolution: 0.1mbar
    • 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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