Monnit wireless grains per pound sensors measure the mass in grains of H2O in otherwise dry air. Put simplistically, the measurement is the weight of water in air. This sensor uses a calibrated humidity sensor to obtain the absolute humidity at the current temperature and converts that value into the Grains per Pound measurement displayed. User customization allows you to set the frequency of readings and the ability to set conditions for alerts by SMS text, email or voice call.
The standard version of this sensor is powered by two replaceable 1.5 V AA sized batteries (included with purchase). This sensor is also available with a line power option. The line powered version of this sensor has a barrel power connector allowing it to be powered by a standard 3.0 - 3.6 V power supply (Included with Line Power option upgrade). The line powered version also uses two standard 1.5 V AA batteries as backup for uninterrupted operation in the event of line power outage.
Power options must be selected at time of purchase, as the internal hardware of the sensor must be changed to support the selected power requirements.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting frequency and other variables.
Grains Per Pound Sensor Specifications
|Accuracy||± 1.8% under normal conditions ( 10% - 90% RH )|
|RH Operating Range||0 – 100% RH|
|RH Operating Range||8 sec (tau 63%)|
|Battery Type||2 Replaceable AA 1.5 V Batteries|
|Dimension||4.375 in x 2.470 in x 1.12 in|
|Sensing Element||2.0 - 3.6 V (2 x AA 1.5V Batteries or Optional Power Supply)|
|Device Range||250 - 300 ft. non-line-of-sight device range*|
|Battery Life||At 1 hour heartbeat setting, included AA batteries will typically last 3-4 Years. **|
|Max Operating Temperature Using AA Alkaline||-18°C to 55°C (0°F to 130°F)|
|Max Operating Temperature Using AA Lithium||-40°C to 60°C (-40°F to 140°F)|
|Optimal Battery Operating Temperature||+10°C to +50°C (+50°F to +122°F)|
900 MHz Specifications
|Operating Frequency||900 MHz Operating Frequency|
|Certifications||Complies with Part 15 of the FCC Rules. (FCC ID: ZTL-RFSC1)
Complies with Industry Canada standards. (IC: 9794A-RFSC1)