The Monnit Wireless Resistance Sensor outputs the resistance across a load. It is programmed to sleep for a user-given time interval (heartbeat) and then wakeup, send power to the load resistor, wait for it to stabilize, and convert the analog data, mathematically compute the resistance and transmit the data to the gateway, where it is then logged into a cloud service. The user can configure defined thresholds and have the system alert on threshold breaches. Data is recorded in Ohms.
Monnit Industrial Sensors come in an IP65, NEMA 4X, CE rated, sealed, and weatherproof enclosure. They are powered by a single, replaceable, Industrial grade 3.6 V battery (included).
An optional solar powered version is also available. The solar powered version includes a Lithium Iron Phosphate rechargeable battery in conjunction with a solar power cell to keep the battery charged and at optimal capacity. If there is no light present at the solar cell, the battery alone could continue to power the sensor for up to 5 years.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting frequency and other variables.
Resistance Sensor Specifications |
|
| Resistive Range (in Ohms) | 0 – 145000 |
| Specific Resistive Ranges (in Ohms) | 0 – 530, 530 – 3500, 3500 – 27200, 27200 - 145000 |
| Resolution | 2047 Unique Values Per Specific Range (11 bit): ~.25, ~1.71, ~13.3, ~70.8. |
| Accuracy | +/- 3% FS of Specific Range |
| User Calibrated Accuracy | +/- 1.5% FS of Specific Range |
| Lead Wire Length | 1 ft. ( 12 in.) |
| Weight | 4.0 oz. |
Variation Specifications |
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| UL Rating | UL Listed to UL508-4x specifications (File E194432) |
Industrial Specifications |
|
| Dimension | 3.7 in x 2.32 in x 1.38 in |
| Max Operating Temperature | -40° to 85°C (-40° to 185°F) |
| Device Range | 300 - 350 ft. non-line-of-sight device range* |
| Supply Voltage | 2.0 - 3.6 V |
| Battery Type | Replaceable 3.6V, 1800mAH (single AA sized) |
| Optimal Battery Operating Temperature | +10°C to +50°C (+50°F to +122°F) |
| Battery Life | Up to 7 Year Battery Life.** |
| Solar Power Option | 5 VDC Solar Panel 600 mAH Rechargeable Battery (>2000 Charge Cycles - 80% of Initial Capacity) Charging Temperature Range: 0° to 45°C (32° to 113°F) Max Temperature Range: -20° to 60°C (-4° to 140°F) |
| Enclosure Material | IP65, NEMA 4X, CE rated, sealed, weatherproof enclosure |
| UL Rating | UL Listed to UL508-4x specifications (File E194432) |
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) |
