Product Overview
The JZ Series graphite hotplate is a constant-temperature heating system developed for laboratory sample preparation. Its isostatically pressed high-purity graphite surface replaces conventional open-flame heating and provides rapid heat-up, uniform temperature distribution, resistance to acids and alkalis, and safer flame-free operation. It supports sample digestion, acid evaporation, boiling, acid volatilization, baking, drying and constant-temperature heat treatment. Typical users include environmental laboratories, food and pharmaceutical testing facilities, public-health and quality-control laboratories, chemical companies, universities and research institutes. The unit is also suitable as a sample-preparation accessory for AAS, ICP and other analytical instruments.
How It Works
Key Advantages
The isostatically pressed, high-density graphite plate resists strong acids, alkalis and high temperatures. It is designed to resist warping, cleans easily and supports long-term use in acid-fume environments.
PID auto-tuning provides consistent heating with low multi-point temperature variation. Temperature calibration, overtemperature alarm and overtemperature protection support repeatable batch processing.
A double-layer insulated chamber helps keep the outer housing cooler. The coated housing, independent heat-dissipation design and non-slip rubber feet support stable operation.
A separate controller can be installed outside the fume hood to reduce acid-fume exposure of electrical components.
Multiple surface sizes accommodate beakers, digestion tubes and crucibles for simultaneous processing of multiple samples.
Model Selection Guide
| Parameter | JZ300×200SM | JZ400×280SM | JZ450×350SM | JZ600×400SM |
| Heating Surface (mm) | 300×200 | 400×280 | 450×350 | 600×400 |
| Surface Material | Isostatically pressed high-purity graphite | Isostatically pressed high-purity graphite | Isostatically pressed high-purity graphite | Isostatically pressed high-purity graphite |
| Plate Thickness | 10 mm | 10 mm | 10 mm | 10 mm |
| Heating Method | Resistance wire + mica sheet | Resistance wire + mica sheet | Resistance wire + mica sheet | Resistance wire + mica sheet |
| Temperature Range | RT to 420°C | RT to 420°C | RT to 420°C | RT to 420°C |
| Temperature Uniformity | 2% | 2% | 2% | 2% |
| Control Accuracy | ±1°C | ±1°C | ±1°C | ±1°C |
| Single-Point Fluctuation | <0.2°C | <0.2°C | <0.2°C | <0.2°C |
| Display | HD color display | HD color display | HD color display | HD color display |
| Timer Range | 0–9,999 min | 0–9,999 min | 0–9,999 min | 0–9,999 min |
| Safety Protection | Overtemperature protection, alarm and power-failure protection | Overtemperature protection, alarm and power-failure protection | Overtemperature protection, alarm and power-failure protection | Overtemperature protection, alarm and power-failure protection |
| Power Supply | 220 V, 50 Hz | 220 V, 50 Hz | 220 V, 50 Hz | 220 V, 50 Hz |
| Heating Power | 1500 W | 2000 W | 3000 W | 3700 W |
| Net Weight | 9 kg | 12 kg | 17 kg | 25 kg |
