Sensor for detection of liquid spills on surfaces

Patent · Sun Jan 01 00:00:00 EST 1989

OSTI ID:875237

Davis, Brent C. ^[1]; Gayle, Tom M. ^[1]

---

1. Oak Ridge, TN

A surface liquid detector is disclosed for detecting liquids spilled on surfaces such as floors. A temperature-sensitive thermistor probe is used in a bridge circuit to detect the change in resistance in the thermistor due to the change in thermal conductivity that occurs when a liquid contacts the probe. The device is characterized by the ability to detect either conductive or nonconductive liquids, such as water or oil spills.

• Research Organization: Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-76DP00789
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): H000652
• Application Number: 07/233092
• OSTI ID: 875237
• Resource Relation: Patent File Date: 1988 Aug 17
• Country of Publication: United States
• Language: English

Related Subjects

statutory invention registration
sensor
detection
liquid
spills
surfaces
surface
detector
disclosed
detecting
liquids
spilled
floors
temperature-sensitive
thermistor
probe
bridge
circuit
detect
change
resistance
due
thermal
conductivity
occurs
contacts
device
characterized
ability
conductive
nonconductive
water
oil
thermal conductivity
bridge circuit
conductive liquid
surface liquid
/340/73/200/