HM Digital PM-2-NF External Inline TDS Purity Monitor with Transformer

The HM Digital PM-2 External Inline TDS Purity Monitor is ideal for use with water coolers or other enclosed water purification systems. The PM-2 alerts you when the filtration system requires service. The transformer is included with this monitor.Features: Available with 1/4", 3/8" or 1/2" quick connect fittings External single line internal TDS monitor that is ideal for most water purification systems. Includes a light and optional alarm that alerts the user service is required when the TDS level reaches the pre-programmed set-point. Set points of any even number between 2 and 200 ppm Specifications: Range: 0-200 ppm (mg/L) Accuracy: +/- 2% Calibration: factory calibrated Alert: warning light, optional alarm Light color: either red or yellow Light function: either flashes or is steady Alarm: beeps for 20 seconds, then goes silent Power source: AC 110V / 220V ±2% Cable length: 62.86 cm (24.75") Fittings: 1/4" standard, also available with 3/8" or 1/2" Dimensions: 12.9 x 7.3 x 6 cm (5