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The CAP-300 is useable from 100% water to 100% coolant or any mixture of coolant and water.
It is a point level sensor for applications such as power generation equipment, off highway vehicles and cell phone tower generators. The sensor’s protruding black electrode detects the presence or absence of the liquid medium which is composed of 0-100% mixture of Glycol based coolant and water, and actuates a solid state switched output.
Open collector, Sinking NPN or Sourcing PNP output, 9-32 VDC, 30mA max.
3 pin Deutsch, 18 AWG type SXL flying leads or 18 AWG PVC cable.
Reverse voltage: up to 45VDC; Overvoltage 80VDC min. Meets requirements of ISO 7637-2. Output protected against shorts to ground or supply.
Recalibration will not be necessary if the coolant changes, the sensor will continue to operate.
Nearly zero maintenance, the sensor is small in size, tolerates coating and will remain reliable even in the standby mode.
The sensor switching threshold is factory set at a Dielectric Constant (Dk) value of 30. Media with a Dk greater than 30 will be detected as “WET”. Conversely, media with a Dk less than 30 will be detected as “DRY”.
The current design is specifically for conductive coolant applications. The dielectric of oil is too low and will not work with the current design.
The sensor is functional in any orientation. Mating customer surfaces shall be kept a minimum of 0.1” from any surface of the black plastic electrode. Gems recommends that the black sensing tip is not recessed into the side of a tank or adapter fitting because liquid (or air) may become trapped leading to false signals. Consult the factory for advice in this situation.
Standard units come with no delay. The response time is less than one second. For low quantities, we can offer a 5 and 10 second delay. Tolerance +/- ½ second. Gems can also customize the delay up to 99 seconds for large volume OEM applications. Call Gems for more information.
Delays are useful when the liquid being sensed is subjected to frequent sloshing or the reservoir’s attitude changes significantly.
It currently has CE, IP67, RoHS, and IP6K9K.
It is a sealed design which prevents fluid intrusion.
It is not likely that this will affect the sensor.
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