HANNA Conductivity Controller (1 S/cm Resolution) with Probe or Transmitter Input

The HI8931 is a user-friendly, panel-mounted conductivity controller. It accepts both electrode and transmitter inputs, offering compatibility with the HI 7635 (for in-line use) and HI 7638 (for tanks) probes, each equipped with an NTC sensor for temperature-compensated measurements. This device supports direct connections up to 20 meters and, when paired with a 4-20 mA output transmitter (HI 8936 or HI 8936L series), ensures a robust, interference-free signal at distances up to 300 meters. Key features include selectable ON, OFF, and automatic dosing control, a built-in auto-diagnostic function, user-selectable 4-20 and 0-20 mA outputs, a backlit LCD, and a transparent splash-proof cover. It comes with mounting brackets and instructions, and offers a range of 0 to 1999 S/cm with a resolution of 1 S/cm and accuracy of 2% F.S. at 20°C. The HI8931 operates within a temperature range of -10 to 50°C and a humidity range of up to 95% non-condensing.

• Included Components: HI8931, HI 7635, HI 7638, NTC
• HI8931 Series: 20 m (67) Direct Connection
• Compatibility: Both Electrode and Transmitter Inputs
• Control Modes: Selectable Manual and Automatic Dosing
• Diagnostic Feature: Built-in Auto-diagnostic Function
• Output Options: 4-20 mA and 0-20 mA User-selectable
• Display: Backlit LCD
• Protection: Transparent Splash-proof Cover
• Indicators: Operational Mode LED
• Usage: Panel-mounted Conductivity Controller for Simplicity
• Connection: Up to 20 m (67) Without Signal Amplification
• Signal Strength: Up to 300 m (1000) with Transmitter
• Included Accessories: Mounting Brackets and Instructions
• Manual Access: Downloadable
• Technical Details: Specification