Common Features

• Capacity: 2000 state changes
• Time resolution: 0.5 second
• Minimum state duration: 0.5 second
• Readout and relaunch with optional HOBO Shuttle
• Drop-proof to 5 feet
• Mounting kit included (hook/loop, magnet, and tape)
• Programmable start time/date
• Memory modes: stop when full, wrap-around when full
• Nonvolatile EEPROM memory retains data even if battery fails
• Blinking LED lights show current state
• User-replaceable battery lasts one year
• Battery check at launch
• Operating range: -4°F to +158°F (-20°C to +70°C), 0 to 95% relative humidity, non-condensing, non-fogging
• Time accuracy: ±1 minute per week at +68°F (+20°C)
• Size/Weight: 2.4 x 1.9 x 0.8" (60 x 48 x 19mm)/approx. 1 oz. (29 gms)
• One year warranty 
• Hobo Event loggers record when devices change between on and off or open and closed, storing the time, date, and state for each change.  Black arrows in diagram below show when data is recorded:
  

   

• A software starter kit is required for operation
  BoxCar Pro 4.0+ starter kit includes software, computer interface cable and software manual.

HOBO® Motor on/off  (AC field) Logger   HO6-004-02

xxxxThe HOBO^® Motor on/off (AC filed) logger records when devices change between on and off xxxxby sensing the flow of electrical current to the device.  Time, date, and state for each change is xxxxlogged.  Downloaded data may be viewed as a table or graph, with export capability to other xxxxapplications.

xxxxMagnetic field intensities fall off rapidly with increasing distance from their source (motor, xxxxtransformer, or even a single wire carrying a large AC current). This means that the logger must xxxxbe mounted very close to (ideally directly on) the field source. While this may make it less xxxxconvenient to attach the logger, it means that interference from other sources is less likely.

xxxxSpecifications:

• Magnetic field threshold: ~2 Gauss at 60 Hz. The logger will typically work with AC motors drawing 1 A or more. Mount it on or close to the motor housing or to one phase of the power line to the equipment being monitored.
• Angular response: the logger is sensitive to that part of the AC field that is perpendicular to the logger's face.

HOBO® Motor on/off (Vibration) Logger   HO6-003-02

xxxxThe HOBO^® Motor on/off (Vibration) logger records when devices change between on and off by xxxxsensing the vibration of the operating device.  Time, date, and state for each change is logged.  xxxxDownloaded data may be viewed as a table or graph, with export capability to other xxxxapplications.

xxxxThe vibration sensor will reliably detect vibrations greater than 0.05 G which is roughly xxxxequivalent to the vibration produced by a household air conditioner when it is on. This logger will xxxxnot work if the vibration is too small, such as the vibration from a household refrigerator.

xxxxA vibration is only weakly dampened by distance so that the logger need not be mounted xxxxdirectly on the source. However, this leads to the potential of interference from other sources. xxxxThe logger's threshold adjustment can be used to help discriminate against other sources.

xxxxSpecifications:

• Vibration threshold: adjustable ~0.05 G to 0.5 G at 60 Hz (.0001" to .001" displacement).
• Angular response: the logger is sensitive to that part of the vibration that is perpendicular to the logger's face.

HOBO® Light on/off Logger  HO6-002-02

xxxxThe HOBO^® Light on/off logger records when lights change between on and off, storing the time, xxxxdate, and state for each change.  Downloaded data may be viewed as a table or graph, with xxxxexport capability to other applications. 

xxxxSpecifications: 

• Light threshold adjustment range: approx. 10 to 300 footcandles (fluorescent light). The sensitivity to incandescent light is about ten times greater. See plot below. 
  
  

  
  

Hobo® State Logger  HO6-001-02

       The HOBO^® State Logger records open and close events of electrical contacts or equipment xxxxmovement by proximity switch.  The time, date, and state for each event is recorded.  xxxxDownloaded data may be viewed as a table or graph, with export capability to other xxxxapplications.   

xxxxSpecifications:

• Two inputs: a magnetic sensor mounted in the logger and an external input cable for detecting contact closures.
• Spacing between HOBO^® State and external magnet: closed < 1/4"; open > 3/4" (external magnet included).
• External contact input: passive relay switch or contact closure.