Monnit's ALTA wireless 0-20mA current meters are capable of measuring the current off another device or sensor, up to 20mA (DC), by connecting the leads of the sensor to the positive and ground terminals of the device being measured. Examples of interfacing devices include, but are not limited to: Current transducers (CTs) with outputs up to 20 mA, pH sensor, dissolved oxygen sensor, pressure sensor, magnetic flow meters, velocity or acceleration sensors, industrial vibration sensors, industrial accelerometers, any kind of sensor that specifies the output is in (mA) within the range of 0 – 20.
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.
* Actual range may vary depending on environment.
** Battery life is determined by sensor reporting frequency and other variables.
0-20 mA Current Meter Specifications |
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| Resolution | ~ 0.01 mA (11-bit single ended) |
| Accuracy | Uncalibrated: 0.7mA, 0.35mA typical Caibrated: 0.05mA |
| Conversion Time | 228 µs |
| Full Scale Voltage | 0 - 20 mA |
| Weight | 0.7 oz. |
Variation Specifications |
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| Security | Encrypt-RF® (256-bit key exchange and AES-128 CTR) |
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 4 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) |
