Keller Acculevel Submersible Level Transmitter
Starting at $527.50

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Instrumart is a value added distributor for Keller and can build certain Acculevel configurations in-house


  • Non-linearity, hysteresis, & non-repeatability accuracy
    • ±0.1% (±0.05% optional) FS Static (25°C)
    • ±0.25% (±0.1% optional) FS Total Error Band
    • SDI version includes higher accuracy ±0.1% FS TEB
  • NSF 61 and NSF 372 certifications (PE jacket only)
  • 4-20mA & SDI-12 include lightning protection
    • Lifetime warranty against voltage surges
  • Ranges available from 0 to 3 up to 900ftWC
  • 316L stainless steel construction (Titanium optional)
  • -10 to 80ºC compensated temperature
  • IP68 environmental protection
  • 2yr warranty covers defects in materials & workmanship
  • Built in the USA (ARRA Section 1605 Compliant)
  • CE certified

The Keller Acculevel submersible level transmitter incorporates microprocessor-controlled signal conditioning to provide outstanding accuracy over temperature. The ability of the Acculevel to provide sustained performance over a wide range of operating conditions makes it ideally suited to environmental monitoring applications such as surface water, streams, and reservoirs. The RS485 connection allows users to retrieve both level and temperature data, interface with a PC, and rescale the analog output from 10% to 110% of the basic range (converter cable and Keller software required).

The most recent model is the serial digital interface version, the Acculevel SDI. It combines two industry standard digital communication protocols (SDI-12 & RS485) and is suited for environmental monitoring applications using existing SDI-12 monitoring equipment. The Acculevel SDI is great for remote applications that require battery-powered operation with minimal current draw and networking multiple sensors to a data recorder.

The Acculevel transmitter with PE jacket is approved to NSF 61 and NSF 372 standards for water quality. Models equipped with 4-20mA or SDI-12 output include guaranteed lightning protection at no additional cost. This internal circuit provides a lifetime warranty against damage from voltage surge, making it perfect for installation in areas prone to chronic damage due to transients caused by lightning.

Keller 1820-28-A3 External Surge Protector
Lightning/surge protection of power supplies, readouts, and PLCs
Keller 900001.0002 Drying Tube Assembly
Attaches directly to cable vent tube and intercepts water vapor
In Stock
Keller 900001.0034 Termination Enclosure
NEMA 4X clear front enclosure with liquid-tight cable fittings & a terminal strip, allows for mounting a drying tube or bellows assembly
In Stock
Keller 900001.0014 Pressure Test Adapter
Pressure test adapter for the Levelgage and Acculevel
Keller 900001.0009 Bellows Assembly
Aneroid bellows attaches to cable vent, alternative to the drying tube
In Stock
FloCat STE-DISP Sensor Termination Enclosure with Display
Compatible with any manufacturer's transmitter & moisture protection method, outputs preprogrammed by Instrumart at no cost
In Stock

Application Notes

Here's how some of our customers used this product.

Temperature Compensated Well Water Level Monitoring

The Background: Our customer is a farmer who uses a fresh-water well to provide water for all uses on the farm. He requires an accurate means of monitoring water level in this well.

The Problem: The customer has been using a level sensor that was not temperature-corrected which was causing accuracy issues making it impossible to know the true water level in the well.

The Solution: We recommended the Keller Acculevel submersible level transmitter which is fully compensated for temperatures from -10 to 80ºC. The total error band is just 0.1% making it easy for the customer to get accurate results. The Acculevel also offers guaranteed lightening protection making it a great solution for this application.