The Testo 826 series infrared thermometers (T1‑T4) instruction manual provides safety guidelines, operation steps, technical specifications, and maintenance…
The Testo 826 series are compact infrared thermometers for non‑contact surface temperature measurement. Models T3 and T4 also include an integrated penetration probe for contact (core) temperature measurements. The devices are intended for industrial and food‑service use and are not suitable for medical diagnostics.
The manual covers safe handling, battery replacement, cleaning, and detailed operating procedures for infrared and contact measurements. Technical data such as measurement ranges, resolution, accuracy, emissivity settings, laser safety, power supply, and environmental limits are provided for each model.
| IR measurement range | -50 to +300 °C / -58 to +572 °F |
|---|---|
| IR resolution | 0.1 °C / 0.1 °F |
| IR accuracy | ±1.5 °C (-20 to 100 °C) / ±2.7 °F (-4 to 212 °F) at 23 °C |
| Emissivity adjustment range | 0.10 to 1.00 |
| IR measurement rate | 0.5 s |
| Lens ratio (90 % value) | 6:1, opening diameter 12 mm |
| Laser type | single laser (T2/T4) |
| Laser output / wavelength | < 1 mW / 645‑660 nm |
| Temperature sensor type | NTC |
| Temperature sensor range | -50 to +230 °C / -58 to +446 °F |
| Battery type (T1/T3) | 2 × Lithium 2032 |
| Battery life (T1/T3) | ≈ 100 h |
| Housing material | ABS (white) |
| Dimensions (W × H × L) | 33 × 162 × 19 mm |
| Warranty | 2 years |
Turn the instrument off, slide the battery compartment cover down, remove the used battery, insert a new one observing correct polarity, and close the compartment.
The infrared measurement range is –50 °C to +300 °C (–58 °F to +572 °F).
In the infrared measurement view, press and hold the emissivity button for 3 seconds, then use the adjustment keys to set the emissivity between 0.10 and 1.00.