HM Digital PPH-1000 Single-Line pH & Temperature Controller

The HM Digital PPH-1000 is a professional-grade, single-line pH and temperature controller engineered for industrial and commercial water treatment systems. With a 4-20mA analog output, dual relay control, and automatic temperature compensation (ATC), the PPH-1000 delivers precise, continuous pH management for demanding applications — from chemical dosing systems to aquaculture, hydroponics, and process water control.

Key Features

• 4-20mA output signal — integrates directly with PLCs, SCADA systems, and industrial controllers
• Dual relay control — two independently adjustable set points (High & Low) maintain your target pH range automatically
• Digital calibration — calibrate to any point with on-screen buttons; no manual potentiometers
• Automatic Temperature Compensation (ATC) — accurate readings from 1–60°C regardless of process temperature
• On-screen temperature display — monitor pH and temperature simultaneously on the bright LED display
• Includes ¾" pH electrode probe — 3m (9.8 ft.) cable for flexible installation
• Optional alarm output — configurable alert for out-of-range conditions

Professional Applications

The PPH-1000 is the go-to pH controller for:

• Commercial water treatment and chemical dosing systems
• Hydroponics and greenhouse nutrient management
• Aquaculture and fish farming pH regulation
• Industrial process water quality control
• Swimming pool and spa automated pH dosing

Technical Specifications

• Model: PPH-1000
• Manufacturer: HM Digital
• pH Range: 0.01 – 14.00 pH
• Accuracy: ±0.5% F.S.
• Resolution: 0.01 pH / 0.1°C (0.1°F)
• ATC Range: 1 – 60°C
• Calibration: Digital, any point
• Output Signal: 4-20mA
• Relay Controls: 2 (upper and lower limit)
• Relay Switching: 5A, 250VAC
• Alarm: Optional setting
• Display: Bright 5/8" LED
• Probe: ¾" electrode, 3m (9.8 ft.) cable
• Power: AC 110V / 220V
• Dimensions: 7.2 × 7.2 × 11.1 cm (2.8 × 2.8 × 4.4 in.)
• Weight: 235g (8.3 oz.)
• Country of Origin: South Korea
• SKU / MPN: PPH-1000
• Barcode / UPC: 891144000878