The ELMESS QTRKK is a wall‑mountable room thermostat for hazardous areas, featuring fixed temperature settings and ATEX‑rated protection.
The QTRKK is a room thermostat designed for wall mounting in explosive atmospheres (hazardous areas II 2G and II 3D). It is housed in a shock‑resistant polyester case filled with pure mineral material and includes a sensor and a 2 m connecting cable that cannot be opened.
Installation is performed with two factory‑mounted fastening clamps. The device operates in ambient temperatures from –25 °C to +40 °C (EN 50014), with an extended range of –40 °C to +70 °C available on request. It provides fixed temperature settings of +5 °C, +10 °C, or +15 °C, and is protected by an EEx q II T6 “sand capsule” type with a minimum IP54 rating. No regular maintenance is required, and repairs are not permitted as they would void the protection class. This manual is written in German.
| Fixed temperature settings | +5 °C, +10 °C, +15 °C |
|---|---|
| Ambient temperature range | -25 °C to +40 °C |
| Extended ambient temperature range (on request) | -40 °C to +70 °C |
| Protection type | EEx q II T6 (sand capsule) |
| Minimum IP rating | IP54 |
| Electrical connection | 400 V ~ 16 A or 250 V – 0.24 A |
| Connecting cable | 2 m H07 RN‑F 3×1.5 mm² |
The thermostat offers fixed temperature settings of +5 °C, +10 °C, and +15 °C, which must be specified when ordering.
It is approved for all hazardous areas II 2G and II 3D in EU countries.
No special maintenance is required; repairs are not permitted because opening the housing would void the protection class.