Hanna HI981421-02 temperature monitor

Hanna HI981421-02 temperature monitor

The Hanna HI981421-02 temperature monitor is a continuous, real-time EC, TDS, and temperature monitor designed for precision nutrient management in hydroponic, aquaponic, greenhouse, and fertigation applications. Supplied with a HI1285-9 industrial-grade in-line multiparameter probe, this monitor allows for seamless integration into high-pressure systems with continuous data logging and smart alarm features.

Built for demanding environments, the monitor features an IP65-rated housing, robust PVC probe, and automatic data storage, giving growers the information and control they need to maintain a healthy growing environment.

Features

• Real-Time Monitoring of EC, TDS, and Temperature
  Tracks all key water quality parameters continuously with high accuracy and stability.

• Industrial-Grade Multiparameter Probe
  Includes the HI1285-9 probe with triple-junction design, integrated temperature sensor, and DIN connector with a 3-meter cable for inline, high-pressure applications.

• Wide Measurement Range with High Accuracy

  • EC: 0.00 to 10.00 mS/cm, ±0.1 to ±0.2 mS/cm

  • TDS: Up to 7000 ppm, ±2% full scale

  • Temperature: 0.0 to 60.0°C, ±0.5°C

• Automatic Temperature Compensation
  Ensures EC/TDS readings remain accurate as solution temperature changes (β = 1.9%/°C).

• Smart Calibration
  One-point EC calibration at 1.41 mS/cm or 5.00 mS/cm, or using Quick Calibration for rapid setup.

• 30-Day Data Logging
  Logs measurements every 15 minutes, storing minimum, maximum, and average values automatically for the past 30 days.

• GLP-Compliant Calibration Records
  Retains the last 5 EC calibrations with date and time stamps for traceability.

• Customizable Alarms
  High and low alarms for all parameters, with user-defined enable/disable settings.

• USB Data Export
  USB Type-C port allows easy export to flash drives or PC for further analysis or reporting.

• Rugged IP65 Enclosure
  Built to withstand harsh agricultural conditions with water-resistant protection and compact design.

Specifications

Electrical Conductivity (EC)

• Range: 0.00 to 10.00 mS/cm

• Resolution: 0.01 mS/cm

• Accuracy: ±0.1 mS/cm (0.00–5.00), ±0.2 mS/cm (5.00–10.00)

• Calibration: One-point auto recognition at 1.41 or 5.00 mS/cm, or Quick Calibration

• Temperature Compensation: Automatic, β = 1.9%/°C

Total Dissolved Solids (TDS)

• Range: 0–5000 ppm (0.5 CF), 0–7000 ppm (0.7 CF)

• Resolution: 10 ppm

• Accuracy: ±2% of full scale

• Conversion Factor: Selectable 0.5 or 0.7 CF

Temperature

• Range: 0.0 to 60.0°C

• Resolution: 0.1°C

• Accuracy: ±0.5°C

Probe (HI1285-9)

• Type: In-line, pre-amplified, triple-junction pH/EC/TDS/temp sensor

• Material: PVC body

• Pressure Rating: Up to 8 bar

• Dimensions: 187 × 25 × 25 mm

• Weight: 191 g

• Connector: DIN, 3 m cable

General

• Display: 128 x 64 pixel B/W LCD with green backlight

• Data Logging: Last 30 days (15 min interval)

• GLP: Stores last 5 EC calibrations with timestamps

• Alarms: High/low alarms with enable/disable settings

• Connectivity: USB Type-C

• Power Supply: 12 VDC adapter (included)

• Environment: -5 to 50°C; max 95% RH (non-condensing)

• IP Rating: IP65

• Dimensions: 125 × 185 × 38 mm

• Weight: 333 g

Applications

• Hydroponics & Aquaponics
  Provides critical insight into nutrient strength and water temperature to ensure healthy plant and fish growth.

• Greenhouse Nutrient Management
  Monitors nutrient tanks or inline delivery systems to maintain consistent EC and TDS levels.

• Commercial Fertigation Systems
  Supports automated dosing systems by delivering continuous, real-time feedback.

• Industrial Agriculture
  Designed for robust performance under high pressure and in water-recirculating systems.

• Educational & Research Settings
  Ideal for academic labs and institutions focusing on controlled-environment agriculture and water chemistry.