Neminath Instruments Neminath Instruments

Neminath Instruments

TDS Meter

TDS meter for measuring total dissolved solids in water. Portable, accurate, and ideal for water quality testing in labs, homes, and field applications.

TDS Meter

1. Application

  • Measures Total Dissolved Solids (TDS) in water and aqueous solutions
  • Used in laboratories, water treatment plants, dairy, food & beverage, and environmental monitoring
  • Helps assess water quality, mineral content, and purity
  • Suitable for routine water testing, quality control, and process monitoring

2. Compliance Standard

  • ISO 9001 certified manufacturing
  • CE / RoHS certified electronic components
  • ASTM D1125 (standard methods for water conductivity & TDS measurement)
  • IEC 61010 compliant for laboratory electrical safety
  • GLP-compliant for laboratory water quality testing

3. Product Description

The TDS Meter is a handheld or benchtop digital instrument for quick measurement of dissolved solids in liquids:

  • Measures TDS in ppm (parts per million) or mg/L
  • Portable, compact, and battery-operated (or mains powered for benchtop versions)
  • Equipped with electrodes/probes and digital display
  • Automatic temperature compensation (ATC) for accurate readings
  • User-friendly interface with one-button operation or digital keypad

4. Technical Specifications

Parameter

Specification

Measurement Range

0–9999 ppm (model dependent)

Accuracy

±2% full scale

Resolution

1 ppm

Temperature Compensation

Automatic / manual (0–50°C typical)

Conductivity Range

0–2000 µS/cm (for dual TDS/conductivity meters)

Power Supply

2 × 1.5 V AA batteries (handheld) / 220–240 V (benchtop)

Display

LCD with backlight (optional)

Electrode Type

Platinum or graphite (TDS probe)

Calibration

Manual or automatic one-point/two-point calibration

Operating Temperature

0–50°C

Humidity

0–80% RH

Housing Material

ABS plastic / splash-proof (IP65 optional)

5. Apparatus is Supplied

  • TDS meter unit
  • Electrode/probe (integrated or separate)
  • Battery (for handheld version)
  • Protective carrying case (for portable meters)
  • Instruction manual and warranty certificate

6. Optional Accessories

  • Replacement electrodes / probes
  • Calibration solutions (standard 342 ppm, 1413 ppm, 12.88 mS/cm)
  • Carrying pouch or rugged field case
  • USB / Bluetooth interface for data logging
  • Benchtop stand or holder for laboratory meters

7. Common Capacities / Ranges Available

  • Handheld portable: 0–999 ppm / 0–1999 ppm
  • Laboratory benchtop: 0–9999 ppm with conductivity measurement
  • High-salinity / industrial models: up to 20,000 ppm
  • Temperature measurement included in most models

8. Dimensions & Weight (Approx.)

Model

Dimensions (H × W × D) mm

Approx. Weight (g / kg)

Handheld portable

150 × 40 × 25

120–150 g

Benchtop lab model

200 × 150 × 100

1–1.5 kg

Industrial high-range

250 × 200 × 120

2–2.5 kg

9. Safety & Handling

  • Do not immerse the meter beyond the recommended level
  • Rinse probe with distilled water after each use
  • Avoid rough handling or dropping the meter
  • Calibrate regularly using standard solutions for accuracy
  • Store in a dry place and remove batteries if not in use for long periods

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