ATM90 Power Energy Monitor Boards Comparison

Parametrics
& Features

GTEM
ATM90E26
ESP32

IPEM
ATM90E32
ESP32

* Popular *

IPEM
ATM90E36
ESP32

Active Energy Accy (%)0.10.10.1
ATM ADC Channels367
ATM ADC Resolution (bits)161616
Board PSU Operating Voltage Range (AC RMS)5 to 20 V5 to 20 V5 to 20 V
Crystal Frequency (ATM)8.192 MHz16.384 MHz16.384 MHz
Current Monitoring Channels1 Phase3 x Phases ATM
& 1 x ESP32
3 x Phases ATM
& 1 x ESP / ATM
Current Range (RMS)0 to 65.535 A0 to 65.535 A0 to 65.535 A
D1 Mini Compatible USBYesYesYes
Data Dumping over DMA (SPI-Master)--Yes
Direct Memory Access (DMA)--Yes
Discrete Fourier Transform (DFT) Function--Yes
Dynamic Range5000:16000:16000:1
EEPROM 24C64 24C64 24C64
Energy Metering Analog Front-End Channels367
Enhanced Poly-Phase High-Performance-YesYes
ESP32 ATM90 Default InterfaceSPISPISPI
ESP32 BT Frequency Range2402 MHz to 2480 MHz2402 MHz to 2480 MHz2402 MHz to 2480 MHz
ESP32 External UART2 Interface-YesYes
ESP32 WLAN Frequency Range2412 MHz to 2462 MHz2412 MHz to 2462 MHz2412 MHz to 2462 MHz
Frequency Detection Range45 to 65 Hz45 to 65 Hz45 to 65 Hz
Increased Functionality--Yes
LED/GPO ActiveYesYesYes
LED/GPO Harmonic -YesYes
LED/GPO ReActiveYesYesYes
LED/GPO Fundamental-YesYes
Low Temperature Drift-YesYes
Mean Power Monitoring-YesYes
Meter TypeSingle PhaseSingle, Split or Three Phase
(3P3W, Y or Δ)
Single, Split or Three Phase
(3P3W, Y or Δ)
OLED Display PortYesYesYes
Operating Ambient Temperature Range–40°C to +85°C–40°C to +85°C–40°C to +85°C
Operating Ambient Temperature Range 24C64–40°C to +85°C–40°C to +85°C–40°C to +85°C
Operating Ambient Temperature Range ESP32–40°C to +125°C–40°C to +125°C–40°C to +125°C
Operating Ambient Temperature Range SMPS–40°C to +85°C–40°C to +85°C–40°C to +85°C
Operating Ambient Temperature Range UART–40°C to +85°C–40°C to +85°C–40°C to +85°C
Operating Voltage - Board AC RMS8 to 12V8 to 12V8 to 12V
Parameter Diagnosis Function--Yes
Power Factor Range-1.00 to +1.00-1.00 to +1.00-1.00 to +1.00
Reactive Energy Accy (%)0.20.20.2
Sag DetectionYesYesYes
Single Point CalibrationYesN/AN/A
Temp Coefficient Type (ppm/degC)1566
Total Harmonic Distortion (THD) Function Current--Yes
Total Harmonic Distortion (THD) Function Voltage--Yes
UART PortYes--
USB Port (Flashing/Logging)YesYesYes
Voltage Monitoring Channels1 Line1 , Split phase or 3 Line1 , Split phase or 3 Line
Voltage Range (RMS)0 to 655.35 V0 to 655.35 V0 to 655.35 V
Voltage Sensor Inputs ATM Maximum (AC RMS)20 V20 V20 V