Keller LEX1 (31bar) Digital Precision Manometer

SKU: KELL303030.0002

Absolute pressure measurement up to 31bar with 1mbar resolution
Piezoresistive transducer in oil-filled metallic casing
Suitable for calibration and laboratory applications

More Info

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Typically ships in 5-7 working days

Members earn 685 reward points

Use reward points to get money off future purchases.

Please note: Customers must be signed into their account to be elegible. Find out more about reward points here.

Never Beaten On Price

Found this product cheaper & in stock somewhere else? Give us the details and we'll endeavour to match the price.

To price match, contact us online or call 0113 248 9966.

FREE Delivery Available

We offer FREE standard delivery on all orders over £249, with a range of next-day options also available on many items.

Find out more on our delivery information page.

60 Day Returns Guarantee

We want our customers to be fully satisfied with the goods they purchase from us, offering returns for up to 60 days.

Find out more about our refunds policy here.

Need Some Help From Our Experts?

We're always happy to offer help, information & advice to find the right instrument for you, so please get in touch.

To speak to our sales team, call us on 0113 248 9966, use our Live Chat service or contact us online.

Keller LEX1 Digital Precision Manometer (31bar)

The Keller LEX1 Digital Precision Manometer has a relative pressure measurement range of -1bar to 31bar and an absolute pressure range of 0bar to 31bar with excellent accuracy of ±0.05% FS and high 1mbar resolution. Measurements are taken via the G ¼” male pressure connector and an oil-cased piezoresistive transducer. It has numerous applications in specialist industries, calibration and laboratories.

Readings are shown on the Keller LEX1’s clear digital screen in a large range of different units. The zero function enables relative measurement and the min/max function records extreme measurements. Onboard digital calibration with an end point and a zero point can be used to ensure accuracy.

The Keller LEX1’s RS485 Fischer data connector allows it to be linked up to a Keller-Bus protocol – a comprehensive monitoring system with up to 128 instruments. An optional Keller K114A cable adaptor is required to connect to a computer USB port in order to enable this feature, but free Keller CCS30 software can be used to coordinate the system.

With just two buttons, the Keller LEX1 is surprisingly easy to use despite its many functions. The ingress protection rating and 2000-hour battery life make it ideal for challenging conditions.

Keller part number: 303030.0002

Key Features

Oil-surrounded piezoresistive transducer
Absolute pressure range: 0 to 31bar
Relative pressure range: -1 to 3bar
Accuracy: ±0.05%
Resolution: 1mbar
G ¼” male connector
Suitable for labs, calibration and specialist applications
Multiple units of pressure
Min/max and zero functions
Digital self-calibration
RS485 Fischer connection
Compatible with Keller-Bus monitoring system

	ECO2	LEO1	LEO2	LEO3	LEO5	LEO Record	LEX1
-1 to 3bar		✔	✔	✔	✔	✔	✔
-1 to 31bar	✔	✔	✔	✔	✔	✔	✔
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 safe version	✔	✔	✔		✔	✔
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				✔	✔		✔

Performance

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

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