Purchase of Lab Equipments for I Year Chemistry Department

Digital pH Meter Recommended Type: Benchtop / Table-top digital pH Meter for Chemistry Laboratory Specifications: Type: Digital Benchtop / Table-top pH Meter pH Range: 0.00 to 14.00 pH (preferably -2.00 to 16.00 pH) Resolution: 0.01 pH (0.001 pH optional for high precision) Accuracy: ±0.01 pH or better mV Range: ±1999 mV (for ORP measurement) Temperature Range: 0 to 100 °C (or -5 to 110 °C) Temperature Compensation: Automatic Temperature Compensation (ATC) Calibration: 1 to 3 point (or up to 5 point) automatic calibration Display: LCD / LED digital display (preferably dual display for pH and temperature) Electrode: Combination glass pH electrode with BNC connector Power Supply: 230 V AC ±10%, 50 Hz (with optional battery backup) Additional Features: Hold function, auto-off, electrode status indicator, RS-232/USB (optional) Applications: Measurement of pH of aqueous solutions, buffer preparation, titration, water analysis and chemical process monitoring in chemistry laboratory.

Digital TDS Meter Recommended Type: Digital Pen-type / Handheld TDS Meter Specifications: Type: Digital Pen-type / Handheld TDS Meter Measurement Range: 0–9990 ppm (mg/L) Accuracy: ±2% Resolution: 1 ppm (0–999 ppm); 10 ppm (1000–9990 ppm) Temperature Range: 0–80 °C Temperature Compensation: Automatic Temperature Compensation (ATC) Display: LCD display Electrode: Titanium / Alloy electrode (replaceable preferred) Power Source: 2 × 1.5 V button cell batteries (LR44 / AG13) Features: Hold function, Auto-off, Factory calibrated (re-calibratable) Dimensions (approx.): 15.5 × 3.1 × 2.3 cm Applications: Water quality testing, RO water, hydroponics, laboratory Note: Suitable models include HM Digital TDS-3 or equivalent pen-type meters widely used in laboratories.

Digital Weighing Balance (Analytical Balance) Recommended Type: Digital Analytical Balance for precise chemical weighing Specifications: Type: Digital Analytical Balance Capacity: 200 g (or 210 g / 220 g) Readability: 0.001 g (1 mg) Repeatability: ±0.002 g or better Linearity: ±0.003 g or better Display: LCD / Backlit LCD display Calibration: External or Internal calibration facility Draft Shield: Yes (glass / transparent draft shield) Overload Protection: Yes Tare Function: Yes (full range) Pan Size: Ø 80–100 mm (stainless steel) Stabilization Time: ≤ 3 seconds (typical) Power Supply: AC 230 V adapter Additional Features: RS-232 / USB interface (optional), level indicator, multiple units Recommendation: For chemistry laboratories, it is advisable to also have a Top-Pan Balance (capacity 500 g – 1 kg, readability 0.01 g) for routine larger quantity weighing, in addition to the 0.001 g analytical balance.