ISSC Resistive Sensitive Switch Data

See selector guide to locate models suitable for your application.

Resistance Detectors

Model 1213 Resistive or voltage sensitive relay Data sheet 1 pages, 77k.
Output pick-up occurs when the unit's probes sense less resistance than unit's maximum sensitivity (3K or 30K ohm max.), low sensitive control point(110 ohm max.) or as a voltage sensitive relay (20V max to 3V min.) Available outputs are 1 N.O., 1 N.C. contacts electrically isolated, 2 N.O. contacts electrically isolated, or 2 N.C. contacts electrically isolated.

Model 1230 resistance sensitive switch Data sheet 1 page, 77k.
1230 resistive relay

A completely solid state control device whose output changes state when resistance impressed on its input terminals matches a predetermined selectable value. An 8 pin termination provides easy installation, and it will operate on 90 to 140 VAC. Output is a 1 A RMS, N.O. triac optically isolated. Resistance sensitivity selectable from 1,000 to 1,000,000 ohms.

Model 1232 resistive sensitive switch with on/off delays Data sheet 1 page, 77k.
Output relay operates when sensing probes come in contact with a material which provides a resistance value lower then the set resistance and the on delay time has elapsed. Output relay releases when the resistance between the probes is greater than the set resistance and the off time delay has elapsed. Power supply can be 120 VAC or 24 VAC/DC.

Model 1234 resistance range switch Data sheet 1 page, 77k.
The 1234 is a window type detector and can be used where fail safe operation is required. Output is operated when sensing probes come in contact with a material which provides a resistance value between the upper and lower set resistances. Output is released when the resistance between the sensing probes is less than the lower set resistance or greater than the upper set resistance. LED indicators show low/good/high conditions. In a typical application the unit could detect a probe shorted to ground(low) or a broke wire to the probe(high).

Model LLD-100/LLP-100 liquid level detector Data sheet 1 page, 77k.
This resistance detector optimized to detect any conductive fluid. A typical application is to signal a high water level and activate a pump to lower the water to a safe level. Output is "off" with no conducting path from probe to aluminum mounting plate. Output is "on" when resistance between probe and aluminum mounting plate is less than 1 Mohm. The LLP-100 is the sensing probe

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