Industrial Wireless AC Current Meter – Single & Three-Phase (20A to 500A)

The ALTA® Wireless AC Current Meter offers reliable, real-time monitoring of alternating current (AC RMS) in both single-phase and three-phase power systems. Designed for industrial and commercial energy management, this sensor uses clip-on current transformers (CTs) to track power usage without interrupting electrical flow.

Available in three sizes to suit your application:

• 0–20 Amp

• 0–150 Amp

• 0–500 Amp

The sensor captures Minimum, Maximum, and Average Amp-RMS, along with cumulative Amp-hours, giving you valuable insight into energy consumption and equipment load. Wireless alerts can be configured when thresholds are exceeded—perfect for predictive maintenance, load balancing, and efficiency monitoring.

⚠️ Note: Requires a Monnit gateway and may require software. See our Gateway & Software section or explore pre-configured sensor kits for a complete solution.

Key Features:

• AC RMS current monitoring for single and three-phase systems

• CT sizes: 20A, 150A, 500A

• Measures Min, Max, Avg current and Amp-hours

• Resolution: 0.1 – 0.3 Amp-RMS

• Accuracy: ±2% (uncalibrated), ±1% (calibrated)

• Wireless data transmission with long battery life

• Configurable thresholds for condition alerts

Common Applications:

• Industrial energy usage tracking

• Motor, HVAC, and pump current monitoring

• Load balancing in electrical panels

• Facility power diagnostics and submetering

• Predictive maintenance and downtime prevention