Keller LEO3 Digital Pressure Transmitter
Starting at $584.00

Not in stock. Usually ships in 4-6 weeks. Call for expedite options [?]

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  • Ranges available in gauge, sealed gauge, & absolute
    • -1 to 3, -1 to 10, or -1 to 30 BARG
    • 0 to 30, 0 to 100, 0 to 300, 0 to 700 or 0 to 1000 BAR-SG
    • 0 to 4, 0 to 10, or 0 to 30 BARA
  • Accuracy: ±0.1%, max. 0.2% FS
  • 0 to 50°C compensated temperature range
  • 8 to 28 V DC supply
  • Up to 90 times/sec measuring rate
  • 2 times/sec display rate
  • IP 65 protection, CEI 529

The Keller LEO3 is a micro-processor based pressure transmitter with a digital 2-line display. The transmitter indicates the current pressure as well as the loop powered (2 wire) 4-20mA output value or the last registered minimum or maximum pressure.

The LEO3 is available in five pressure ranges, including: 0-4 bar, 0-30 bar, 0-300 bar, 0-700 bar, and 0-1000 bar

The LEO3 calculates the pressure up to 90 times per second to an accuracy of 0.2% of full scale. The transmitter for the LEO3 is temperature compensated from 0 to 50°C and has a G ¼" process connection. The LEO3 is IP65 rated for protection in a wide range of environments.

All functions of the LEO3, including output configuration, MAX/MIN display and reset, selecting pressure units and zeroing are easily done via two front keys. The LEO3 is BUS-capable and communication with the instrument takes place with Keller PROG30/READ30 software via the RS485 interface.


Keller Protective Rubber Boot
Protective rubber boot for LEO1, LEO3 and LEX1 pressure gauges
In Stock


Keller 309030.0003 Carrying Case
Soft carrying case (fanny pack) for digital pressure gauges
Call for pricing


Please consider these optional accessories.

Keller K-107 Serial Converter
Screw type terminal serial converter with transmitter supply from integrated 9V battery or external power supply
Keller K-114B USB Converter
Interface converter with binder socket 680 / 5-pin, software CD and USB connection cable