The Sensistor Sentrac is a hydrogen leak detector that uses forming gas (5% hydrogen in nitrogen) as tracer gas. It finds leaks from very small to huge and uses the Strix sensor. It comes in three models: desktop, portable (battery) and panel.
| Models | Sentrac desktop model (AC power) / Sentrac portable model (battery) / Sentrac panel model (panel mounting) |
| Order Numbers | Desktop model 590-970* / portable model 590-971 / panel model 590-972 (*recommended kit) |
| Tracer Gas | Forming gas (5% hydrogen in nitrogen) |
| Detection Method | Sensistor hydrogen gas sensor (diffusion based, extremely sensitive and selective); Strix sensor: faster reaction and recovery time, extended sensor life, easy sensor change |
| Min. Detectable Leak (Locating Mode) | 5 × 10⁻⁷ mbar·l/s or cc/s (5% H₂) |
| Min. Detectable Leak (Measuring Mode) | 0.5 ppm H₂ / 5 × 10⁻⁷ mbar·l/s or cc/s (5% H₂) |
| Start Time | 40 sec |
| Calibration | External calibration leak or calibration gas |
| Inputs and Outputs | Probe control port (digital 5 in / 15 out), 24 V (dc) / USB-C (RS232, USB memory) / BM1000 (expansion communication module) |
| Maintenance | Maintenance free |
| Power Supply | Desktop model: 100–240 V (ac), 50/60 Hz, 67 W max. load / portable model: internal rechargeable battery (Li-Ion)* / panel model: 24 V (dc), 2.2 A (*charged using the adapter supplied, 100–240 V, 50/60 Hz, 0.3 A) |
| Battery Model Operating and Charge Time | Operating time 22 hours / charge time 6.5 hours |
| Dimensions (W x H x D) | Desktop model 305 x 166 x 188 mm (12 x 6.5 x 7.4 in.) / portable model with case 330 x 200 x 280 mm (12.9 x 7.8 x 11 in.) / panel model 305 x 155 x 144 mm (12 x 6.1 x 5.7 in.) |
| Weight (exclusive probe, probe cable and case) | Desktop model 3.5 kg (7.7 lb) / portable model 4.0 kg (8.8 lb) / panel model 2.2 kg (4.8 lb) |
| Interface | Large and bright full color touch display with high resolution / Locating, Measuring and Combined modes / password protected user levels / USB-C for recipe back-up, data storage and PC connection / probe cable connectors on both detector front and back / fieldbus interface for Profibus, PROFINET, DeviceNet and Ethernet/IP |
| Hand Probes | Strix hand probe (rigid neck) 590-730* / Strix Flex hand probe (flexible neck) 590-740 / P60 hand probe (rigid neck) 590-890 / P60 Flex hand probe (flexible neck) 590-892; Strix hand probe: large display, light and ergonomic, narrow probe tip, diffusion sensor (no flow), resilient to high background gas levels, dust and dirt |
| Probe Cables | C21 probe cables 3 m 590-161* / 6 m 590-175 / 9 m 590-165 (9.8 / 19.6 / 29.5 ft) |
| Accessories and Spare Parts | Probe tip protection caps: for Strix hand probe 50 pcs 590-300, 500 pcs 590-305 / for P60 hand probe 50 pcs 591-273, 500 pcs 590-625 / replacement sensors: for Strix hand probe 590-290, for P60 hand probe 590-292 |
| Typical Markets | HVAC/R, mobility and automotive, battery, industrial manufacturing |