This document describes the features and characteristics of Siemens Building Technologies' QAE22 series of insert temperature sensors. These sensors can be used for controlling supply water temperature, return water temperature, and domestic hot water temperature. The document also provides detailed information on different models and accessories.
The manual describes the Siemens QAE22 series of insert type temperature sensors, including variants QAE22A, QAE22.2 and QAE22.5A. It covers the sensor's purpose for water temperature measurement, ordering information, functional principle, and mechanical design.
Technical data such as temperature range, sensitive element, time constants, material construction, and protection ratings are listed. Detailed installation instructions, electrical connection guidance, and internal wiring diagrams are provided to ensure correct mounting and integration with control systems. This manual is written in Chinese.
| Temperature range | -30 to +130 °C |
|---|---|
| Sensitive element | LG‑Ni 1000 |
| Time constant (with protective sleeve) | ≈30 s |
| Time constant (without protective sleeve) | ≈8 s |
| Insertion rod material | Stainless steel DIN 1‑440 |
| Protective sleeve material | Brass (Ms63) |
| Safety rating | EN 60730 |
| Weight (QAE22) | 0.155 kg |
| Weight (QAE22.2) | 0.178 kg |
| Weight (QAE22A) | 0.198 kg |
| Weight (QAE22.5A) | 0.215 kg |
The sensor measures temperatures from –30 °C to +130 °C.
If the pump is on the supply line, install the sensor directly behind the pump; if the pump is on the return line, install it 1.5–2 m after the mixing valve.
The insertion length must be at least 50 mm.
A flat‑sealed protective sleeve must be installed for pressures above PN10.