ALTA industrial wireless AC Current Meters measure the RMS current of an alternating current (AC) system using a current transformer (CT) that wraps around the "hot" wire of a two wire (hot, common, ground(optional)) power system. The sensor reports Minimum RMS current, maximum RMS current, average RMS current, and amp hours to the iMonnit system. The iMonnit system is capable of generating watt hour or kilowatt hour readings as well.
ALTA sensors offer 3 to 4 times the range of standard sensor platforms, extending non-line-of-sight reach to an exceptional 1,200+ feet through walls (12-14 walls typical). Using Frequency-hopping Spread Spectrum (FHSS) also allows ALTA sensors to have better interference immunity from other wireless devices.
Superior power management provides ALTA sensors with almost twice the battery life of Monnit’s standard wireless sensors.
Integrated on-board data storage allows ALTA sensors to store data messages if communication to a wireless gateway is disrupted (power outage, Internet outage, or out of range). Messages that can’t be delivered will be time-stamped and stored in memory (up to the last 512 messages) until communication with the gateway is restored, at which point the messages will all be transmitted.
Over-the-air updates allow ALTA products to be updated remotely if new fixes or features become available.
Monnit ALTA 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 8-10 years.
WARNING: This AC current meter is for monitoring AC voltage only. Do Not Use with DC voltage.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting frequency and other variables.
AC Current Meter Specifications |
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| Absolute Max CT Current | 50 Amps RMS (Arms) |
| Maximum Accurate CT Current | 20 A rms |
| Frequency Measurement Range | 50 – 100 Hz |
| Accuracy | +/- 2% @ 2 to 20 Arms, +/- .07 Arms @ < 2 Arms |
| Calibrated Accuracy with Appropriate Offset | +/- 1% @ 2 to 20 Arms, +/- .035 Arms @ < 2 Arms |
| Offset Limits | -1.27 to + 1.27 Arms (default set to +.1 Arms) |
| Measurement Resolution | ~.01 Arms |
| Weight | 3.7 oz. |
Variation Specifications |
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| Security | Encrypt-RF® (256-bit key exchange and AES-128 CTR) |
| UL Rating | UL Listed to UL508-4x specifications (File E194432) |
ALTA Industrial Specifications |
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| Supply Voltage | 2.0 - 3.8 VDC |
| Battery Type | Replaceable 3.6V, 1800mAH (single AA sized) |
| Battery Life | Up to 10 Year Battery Life.** |
| Max Operating Temperature | -40° to 85°C (-40° to 185°F) |
| Optimal Battery Operating Temperature | +10°C to +50°C (+50°F to +122°F) |
| Solar Power Option | 3.0 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) |
| Dimension | 3.7 in x 2.32 in x 1.38 in |
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) |
