Every heat treatment plant in India has a thermocouple in their furnace. Most have one. Some have two — one near the top and one near the bottom. What they measure is the temperature at that specific point at that specific moment. What they do not measure is the temperature everywhere else in the furnace, throughout the entire heat treatment cycle. And in metallurgical heat treatment, that difference matters enormously.
| Zone Condition | Effect on Steel | Consequence |
|---|---|---|
| Hot spot (+30°C over spec) | Excessive grain growth, oxidation | Soft spots, scale, distortion |
| Cold spot (−30°C under spec) | Incomplete austenite transformation | Inadequate hardness, low strength |
| Uniform temperature | Correct microstructure throughout | Consistent hardness, quality, life |
When multiple thermocouples are placed throughout the furnace volume and all are logged simultaneously, the temperature profile of the complete cycle is documented across every zone. This data reveals:
Heat treaters supplying aerospace, defence, or automotive components face customer and certification body requirements for furnace temperature uniformity records. Countronics CT716 and CT708 generate the multi-point timestamped records required — at a fraction of the cost of dedicated TUS systems. Every batch has a documented temperature history.
| Type | Range | Application |
|---|---|---|
| K-type | 0 to 1250°C | Annealing, hardening, tempering, carburising |
| R-type | 0 to 1700°C | High-temperature furnaces, kilns, glass, ceramics |
| J-type | 0 to 750°C | Low-temperature aging ovens, stress relieving |
| PT100 | −100 to 600°C | Precision tempering, laboratory ovens |
All four sensor types are supported simultaneously on the CT716 — different channels can carry different thermocouple types in the same logger, making it ideal for mixed-temperature process monitoring.
One thermocouple shows only the temperature at that point. Furnaces have hot and cold zones — the variation can be 30–50°C. Only multi-zone monitoring reveals what the load is actually experiencing throughout the entire furnace volume.
Up to 16 channels simultaneously. All zones are scanned and logged at the same time — every entry has the same timestamp for accurate comparison across all zones.
K-type for furnaces up to 1250°C (annealing, hardening, tempering). R-type for very high temperatures up to 1700°C (kilns, ceramics, glass). Both accepted by CT716 and CT708.
No. Data is saved directly to USB pen drive as Excel-compatible CSV. Remove the pen drive and open in Microsoft Excel — no installation, no licence, no cable required.
CT716 generates multi-point timestamped temperature records that provide the data basis for TUS documentation. For formal AMS2750 or NADCAP certification, consult your quality team on record format requirements.
Tell us the number of zones, temperature range, and thermocouple type — we will recommend the right model with datasheet and pricing.
