ISCO Liquid Level Actuator

  • Compatibility Can be used with all Isco samplers: 3700, 6712, Avalanche, Glacier
  • Rugged Construction Probe is built of stainless steel and is corrosion and fouling resistant
  • Widely used
Product Options


Comprising of a conductivity probe that mounts above the flow stream, a control box that mounts on the sampler, and connecting cable, the 1640 liquid level actuator provides a reliable and simple way to trigger a sampling routine when liquid reaches a predetermined level. The level actuator can be used in conjunction with other devices such as flowmeters and rain gauges to trigger sampling when multiple conditions are met.

If the control switch set to "LATCH", the sampler activates when the liquid level reaches to the probe assembly. The sampler then remains actuated when the liquid level recedes. If "TOGGLE/RESET" mode is selected, the sampler will be actuated only while the liquid is touching the probe, and sampling will be suspended if liquid level recedes.

Standard Features

  • Stainless steel, corrosion and fouling resistant conductivity probe.
  • For use with all Isco samplers.
  • Watertight sealed control box

Manufactured by: Teledyne ISCO
Model: ISCO Liquid Level Actuator

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance


Triggers sample collection when liquid reaches predetermined level at the sampling point.


Dimensions (Control Box)
H x W x D
2.92 x 1.38 x 2.25 inches
(7.4 x 3.5 x 5.7cm)
Weight 1.0 lb. (450 gm)
Compatible ISCO Samplers 3700 Series portable and refrigerated samplers, 6700 Series portable and refrigerated Samplers, GLS portable
sampler, Glacier and Avalanche
portable refrigerated samplers, 4700 refrigerated sampler
Output to Sampler Open Collector
Cable Coaxial, 22 ft (7 m) standard; optional
with built-to-order cable length up to
250 ft (75 m)
Power Required 12 VDC (Supplied by sampler)