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.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting frequency and other variables.
Resistance Sensor Specifications |
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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.) |
Variation Specifications |
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Resolution (in Ohms) | 65535 Unique Values Per Specific Range (16 bit): ~3.4, ~125 |
User Calibrated Pressure Accuracy | +/- 2% FS of Specific Range |
Weight | 0.7 oz. (19.84 g) with 3 ft. (0.91 m) lead |
ALTA Coin Cell Specifications |
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Battery Type | Replaceable 3.0V (CR2032) Coin Cell Battery |
Dimension | 2.0 in x 1.125 in x 0.875 in |
Max Operating Temperature | -7°C to +60°C ( 20°F to +140°F ) |
Optimal Battery Operating Temperature (Coin Cell) | +10°C to +50°C ( +50°F to +122°F ) |
Supply Voltage | 2.0 - 3.8 VDC |
Battery Life | At 1 hour heartbeat setting, coin cell battery will last up to 2 years. ** |
Enclosure Technology | Monnit PinchPower™ Wireless Sensor Enclosures |
Enclosure Material | ABS |
ALTA 900 MHz Specifications |
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Operating Frequency | 900 MHz Operating Frequency |
Certifications | Complies with Part 15 of the FCC Rules. (FCC ID: ZTL-G2SC1) Complies with Industry Canada standards. (IC: 9794A-G2SC1) |
Device Range | Device Range Up to 1,200 ft. non-line-of-sight, wireless device range* |
Security | Encrypt-RF® (Diffie-Hellman Key Exchange + AES-128 CBC) |