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Keller LEX1 Ei (3bar) Intrinsically Safe Digital Manometer

Keller
SKU: KELL303030.2001
  • Intrinsically safe for use in hazardous, explosion-prone environments
  • Measures pressure by a piezoresistive transducer in oil-filled housing
  • Suitable for specialist application in calibration and laboratory use
More Info
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Keller LEX1 Ei Intrinsically Safe Digital Manometer (3bar)

The Keller LEX1 Ei Intrinsically Safe Digital Manometer has a measurement range of -1bar to 3bar, accuracy of ±0.05% FS and a resolution of 0.1mbar. It has a piezoresistive pressure transducer surrounded by oil-filled casing and takes measurements via a G ¼” male pressure connection.

As an intrinsically safe instrument, the Keller LEX1 Ei is suitable for use in hazardous environments where there is a risk of explosion. It is classified as zone 1: Ex II 2 G and Ex ia IIC T6 Gb. The certification files are PTB 05 ATEX 2012 X and IECEx PTB 13.0028 X.

The Keller LEX1 Ei has a clear digital screen that shows pressure readings in a number of different readings. It has a digital calibration function with zero and end points, a zero function for relative measurement, and a min/max recording feature.

The RS485 Fischer port on the Keller LEX1 Ei allows it to be used with up to 127 other instruments in a Keller-Bus monitoring protocol. Free Keller CCS30 software is available to help coordinate these instruments but an optional Keller K114A Cable Adaptor is needed to link the gauge up to a USB port.

The Keller LEX1 Ei has just two buttons which makes it very easy to use despite the advanced functionality. It has a 2000-hour battery life and an IP65 ingress protection rating.

Keller part number: 303030.2001

Key Features

  • Intrinsically safe pressure gauge
  • Piezoresistive pressure transducer
  • Oil-filled housing
  • Relative pressure range: -1bar to 3bar
  • Absolute pressure range: 0bar to 2bar
  • Accuracy: ±0.05%
  • Resolution: 0.1mbar
  • G ¼” male pressure connector
  • Specialist applications
  • Works in Keller-Bus protocol
  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
Resolution(at smallest range) 10mbar 1mbar 1mbar 1mbar 1mbar 1mbar 0.1mbar
Temperature range 0˚C to 50˚C
Temperature accuracy ±1˚C
Intrinsically safeversion ✔ ✔ ✔ ✔ ✔
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 withKeller-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

Performance

  • 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

Display

  • 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
Label Type Size Download
pdf Keller LEX1 Datasheet pdf 1.7 MB Download
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    Keller Pressure Gauge Case SKU: KELLCASE
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    £54.00 (inc VAT)
  2. Keller G1/4" female to 1/2" male adaptor - SS316L
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