ECOLOG-PRO 2PTR with external Pt100 4-wire probeKey Features Wireless temperature measurement module with connectors for 2 external Pt100 probes (3 m standard, up to 17 m extension) High accuracy: 0. 2 C; resolution 0. 1 C; measurement range 200 C to +200 C (probe dependent) Local storage: buffers up to 43,000 measurement values to prevent data loss during temporary disconnections Long battery life: 14 months with 3 AA batteries (user replaceable) Flexible positioning: connects via ECOLOG PRO RBR;