| Internal Sensor |
| Maximum State, Event, Runtime Frequency |
1 Hz |
| Preferred Switch State |
No magnet present (normally open) |
| External Input |
| External Contact Input |
Electronic solid state switch closure or logic driven voltage output |
| Range |
0 to 3 V DC (USB powered), 0 to 2.5 V DC (battery powered) |
| Maximum Pulse Frequency |
50 Hz |
| Maximum State, Event, Runtime Frequency |
1 Hz |
| Pulse, Event Lockout Time |
0 to 1 second in 100 ms steps |
| Solid State Switch Closure |
Input Low: < 10 KOhms; Input High: > 500 KOhms |
| Internal Weak Pull-Up |
100 KOhms |
| Input Impedance |
Solid state switch closure: 100 KOhms pull up |
| Logger |
| Resolution |
Pulse: 1 pulse, Runtime: 1 second, State and Event: 1 State or Event |
| Logging Rate |
1 second to 18 hours, 12 minutes, 15 seconds |
| Time Accuracy |
±1 minute per month at 25°C (77°F) (see Plot A) |
| Battery Life |
1 year, typical with logging intervals greater than 1 minute and normally open contacts |
| Memory |
| UX90-001 |
128 KB (84,650 measurements, maximum) |
| UX90-001M |
512 KB (346,795 measurements, maximum) |
| Download Type |
USB 2.0 interface |
| Download Time |
10 seconds for 128 KB; 30 seconds for 512 KB |
| Logger Operating Range |
| Logging |
-20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing) |
| Launch/Readout |
0° to 50°C (32° to 122°F) per USB specification |
| LCD |
LCD is visible from: 0° to 50°C (32° to 122°F); the LCD may react slowly or go blank in temperatures outside this range |
| Size |
3.66 x 5.94 x 1.52 cm (1.44 x 2.34 x 0.6 in.) |
| Weight |
23 g (0.81 oz) |
| Environmental Rating |
IP50 |