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Seattle, WA, 98133
phone: 206.782.8380
fax: 206.363.3534
email: sales@cambriasensors.com

Liquid Detection: EOS Discriminating Sensors

EOS discriminating sensors provide an effective, unique solution to the accurate detection of contaminants in aqueous and other environments. The EOS 100 Series is a 5 level sensor using RS232 comms, and is a sound and cost-effective solution for monitoring secondary containment, sumps, above and underground storage tanks. The EOS485EX is a one to three point sensor in an EX housing, no barrier required. In addition to fuels, the sensors can detect virtually any hydrocarbon, including benzene, carbon tetrachloride, etc. The latest line sensors include differential evanesscent flourescence for the detection of targeted vapors such as hydrazine.


  • Accurately differentiate between hydrocarbons and water
  • Comprehensive set of alarm conditions
  • Secure remote configuration to facilitate compliance changes


EOS100 and EOS 120  - Install vertically in a containment sump or dispenser pan to detect the presence of liquids. Comes with a 10 foot cable. Independent detection points monitor the liquid level and fluid type. Configure each point to detect and report an alarm for fuel only, water only, water or fuel, all liquids. The EOS80 (RS232) and EOS485EX can be installed at any angle. The EOS48EX includes an armored sensor cable up to 15 ft long which is sealed to the explosion-proof housing, and has streaming RS485 and relay outputs.

Compatible Fuels

  • Unleaded gasoline
  • Leaded gasoline
  • Diesel Kerosene
  • Jet fuel
  • Aviation gasoline
  • 5% methanol/95% unleaded
  • 15% ethanol/85% unleaded
  • 15% MTBE/85% unleaded

EOS 100 Discriminating Sensor | Data Sheet

The EOS 100 Discriminating Sensor accurately differentiates between hydrocarbons and water, with up to five independent and redundant detection points. Very high level of discrimination. PNP output alarms for water, fuel.  All channels configurable to report a variety of alarm scenarios.

Mark 1 Sensor Monitor | Data Sheet

The Mark I Monitor provides real-time monitoring of up to 8 sensors. Using a standard 4 wire communication protocol, the user can install a variety of sensors. The unit monitors and alarms locally, and securely records all environmental events. Data cannot be erased or tampered, will upload only to security certificate holder.

EOS 120 Discriminating Sensor with Streaming Digital Data | Data Sheet

The EOS 120 Discriminating Sensor. This unit is an alternative form factor to the EOS100 and is nearly half the length. Digital output only. Very low profile. UL Class I Div I.

EOS 80 Discriminating Sensor | Data Sheet

The EOS 80 Discriminating Sensor provides single-channel detection, with a variety of form factors. The form factor of the EOS80 allows substantial variation in package design and has lent itself to many applications in different environments. The sensor has been made as small as 3mm in diameter. The EOS80-HT is 6mm in diameter and operates continuosly at 225 C and 200 bar (450 F at 3000 psi). The EOS80 Interstitial is the smallest interwall sensor available, less than a third of an inch in diameter (12mm to 8mm).

EOS 80-DCO Dispenser Cut-Off

The EOS80-DCO is a dispenser cut-off system for turbine pumps and similar applications. The unit will monitor the sump for leakage or liquid accumulation and upon detection will cut off the AC power to the dispenser. Uses the EOS 80 UL Class 1 Div 1 sensor technology. Probe is intrinsically safe. Requires no external monitor.