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Operating Principles
Product (Non-conductive liquid) = Steady light and tone
Water (Conductive liquid) = Intermittent light and tone
To detect liquids, Solinst Interface Meters use an infra-red beam and detector. When the probe enters a liquid the beam is refracted away from the detector which activates an audible tone and light. If the liquid is a non-conductive oil/product the signals are steady. If the liquid is water (conductive liquid greater than 50 µS/cm), the conductivity of the water completes a conductivity circuit. This overrides the infra-red circuit, and the tone and light are intermittent.
Both sensors use exactly the same zero point, giving accuracy as good as 1/200 ft. or 1.0 mm. The high accuracy enables the sensors to detect the slightest sheen of oil on the surface of the water; this is indicated by a rapid intermittent tone.
High Quality Design
The state-of-the-art electronics include automatic circuitry testing when the 'On' button is used; 120 hours of on-time battery life; clear signals; and high accuracy.
Infra-red refraction is used to detect liquids and conductivity to distinguish water. Both optical and electronic sensors are precisely aligned at the same zero point. A steady light and tone indicate product. Water is indicated by intermittent signals.
The factory sealed probe does not need to be accessed by the user. An integral stainless steel shield protects the sensors. It is set permanently into place, yet allows for easy cleaning.
The circuits are powered by 2 standard 9V batteries which are housed in easy-access drawers in the faceplate of the reel.
Features
- Sensor accuracy to 1/200 ft. or 1.0 mm
- Certified intrinsically safe
- 5/8" (16 mm) diameter probe
- Easy access batteries: minimum 120 hours of life
- Automatic shut off after 10 minutes
- Inexpensive, simple repairs
- 3 year warranty
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Model 122 & 122M are CSA approved for use in hazardous
locations Class I, Groups C&D |
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