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Keller LEX1 Ei (3bar) Intrinsically Safe Digital Manometer

Keller
SKU: KELL303030.2001
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Key Features
  • 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

Related Categories

Intrinsically Safe (EX Rated) Equipment Pressure Gauges
Description

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
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Specification
No

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
Downloads
Label Type Size Download
pdf Keller LEX1 Datasheet pdf 1.7 MB Download
Reviews
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