描述

The NNR24A is a liquid level control relay designed for pump up or down applications with switch-selectable operation modes. It features a 10 A SPDT relay output with AgCdO contact material rated for 250 VAC / 30 VDC maximum switching voltage, and supports input voltages of 24, 48, 110, or 220 VAC ±15% (50/60 Hz). The device offers adjustable probe sensitivity from 4.7 kO to 47 kO and can operate with one, two, or three probes, with probe isolation rated at 2000 VA. The relay provides exceptional mechanical life of 3 × 107 operations and electrical life of 2 × 105 operations at 2200 VA resistive load, operating reliably across temperatures from -10°C to +60°C. This control is ideal for tank level monitoring, pump automation, and industrial fluid management systems where reliable switching and multi-probe flexibility are required.