Data Acquisition & Logging

Wireless 150 Amp AC Current Meters

The ALTA wireless AC Current Meter measures 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.

• Measures amp hours, max RMS current, min RMS current, and average RMS current

• Two different current transducers available:

• Low Current: 0-20 amp

• High Current: 0-150 amp

• Capable of generating watt hour or kilowatt hour readings using iMonnit

• Data logging for accumulated amp hour readings

• Can notify based on current levels or changes in current levels

• Simple and safe installation of current/power measurement hardware, no rewiring required

 

Principle of Operation

To measure current, clip the CT around only a single wire of the AC system (clipping around a hot and neutral wire at the same time will result in 0 current readings). After the sensor powers on and connects to the gateway, it will begin taking measurements based on the averaging interval (5 seconds default). It will report data to iMonnit every heartbeat or if the current goes outside of the aware thresholds set in iMonnit. The sensor reports amp hours, max RMS current, min RMS current, and average RMS current. iMonnit can also generate watt hour or kilowatt hour readings if a default RMS voltage is set in iMonnit.

• Wireless range of 1,200+ feet through 12+ walls *

• Frequency-Hopping Spread Spectrum (FHSS)

• Improved interference immunity

• Improved power management for longer battery life **(12+ years on AA batteries)

• Encrypt-RF® Security (Diffie-Hellman Key Exchange+AES-128 CBC for sensor data messages)

• Onboard data memory stores up to 512 readings per sensor:

- 10-minute heartbeats = 3.5 days

- 2-hour heartbeats = 42 days

• Over-the-air updates (future proof)

• Free iMonnit basic online wireless sensor monitoring and notification system to configure sensors, view data and set alerts via SMS text and email

*Actual range may vary depending on environment.

**Battery life is determined by sensor reporting frequency and other variables. Other power options are also available.

ALTA Commercial AA Wireless AC Current Meter | Technical Specifications

Supply voltage     2.0–3.8 VDC (3.0–3.8 VDC using power supply) *
Current consumption     0.2 µA (sleep mode), 0.7 µA (RTC sleep), 570 µA (MCU idle),
          2.5 mA (MCU active), 5.5 mA (radio RX mode), 22.6 mA
          (radio TX mode)
Operating temperature range (board circuitry and batteries) -18°C to 55°C (0°F to 130°F) using alkaline
          -40°C to 85°C (-40°F to 185°F) using lithium **
Optimal battery temperature range (AA)     +10°C to +50°C (+50°F to +122°F)
Integrated memory     Up to 512 sensor messages
Wireless range     1,200+ ft non-line-of-sight
           
Security     Encrypt-RF® (256-bit key exchange and AES-128 CTR)
Weight     3.7 ounces

  ALTA Industrial Wireless AC Current Meter | Technical Specifications

Supply voltage           2.0–3.8 VDC (3.0–3.8 VDC using power supply) *
Current consumption           0.2 µA (sleep mode), 0.7 µA (RTC sleep), 570 µA (MCU idle),
            2.5 mA (MCU active), 5.5 mA (radio RX mode), 22.6 mA (radio
            TX mode)
Operating temperature range (board circuitry and battery) -40°C to +85°C  (-40°F to +185°F) **
Included battery Max temperature range -40° to +85°C  (-40° to +185°F)
  Capacity 1500 mAh
Optional solar feature Solar panel 5VDC/30mA  (53mm x 30mm)
  Charging temperature range 0° to 45°C (32° to 113°F)
  Max temperature range -20° to 60°C (-4° to 140°F)
  Included rechargeable battery 600 mAh/>2000 charge cycles (80% of initial capacity)
  Solar efficiency Optimized for high and low-light operation ***
Integrated memory           Up to 512 sensor messages
Wireless range           1,200+ ft non-line-of-sight
Security           Encrypt-RF® (256-bit key exchange and AES-128 CTR)
Weight           4.7 ounces
Enclosure rating           NEMA 1, 2, 4, 4x, 12 and 13 rated, sealed and weather proof
UL rating           UL Listed to UL508-4x specifications (File E194432)

Example Interfacing

• Current monitoring

• Amperage monitoring

• Current usage

• Amp hour meter

Request A Quote Download Brochure