The SMT-A3 Wireless Data Acquisition unit is a multi- channel high precision measurement device designed to interface with a variety of different building sensors. The sleek design of the SMT-A3 allows it to be installed in occupied spaces in building units and homes. The SMT- A3 seamlessly attaches to a double junction box and supports up to eight external sensors with optional integrated sensors.

The 24-bit A/D and long range wireless proven on the SMT-A2 platform is duplicated on the SMT-A3 making it ideal for building monitoring in both new construction and retrofit work.

Options for integrated CO2, RH, temperature and differential pressure are available upon request.

The SMT-A3 communicates wireless sensor readings to the SMT Building Intelligence gateway. Optional powered repeaters can be used to extend the wireless range.

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A3 JB Data Acquisition Unit

Permanent monitoring solutions

Remote sensor analysis and data collection

High precision data acquisition

Building science research

Targeted repair monitoring
Supports up to 8 external resistance channels capable of reading wide moisture content ranges and precision thermistors.

Supports up to 8 0-5V sensors such as RH, pressure differential, LVDT, displacement, light sensors and more.

Supports up to 4 differential voltage inputs capable of reading sensors such as thermocouples, heat flux and more. Gain amplification boost circuitry is available to measure very small voltage differentials.

Optional integrated relative humidity and temperature sensors.

Sensors are installed using a two part terminal block permitting sensor lengths to be cut to their appropriate lengths and terminated prior to installing electronics.

Large internal memory allows an 8 channel unit to log hourly data for up to 3 years without extracting data.

Wireless transceiver with 1000m line of sight communication. Optional repeaters can be used to extend the wireless range.

Communicates to SMT Building Intelligence Gateway (BiG) via USB to Wireless device; SMT-I2.

Extreme low power device and 3 AA battery pack makes the SMT-A3 suitable for long term battery operation.

USB connectivity supports data downloads, configuration and firmware upgrades.

Backlit LCD user interface for easy network and sensor verification
Measurement Specifications

Internal Temperature

Sensor: Cantherm MF58104F39590

Beta 4390K

Range: -40°C to +70°C

Resolution: 0.1°C

Accuracy: ±1°C

Internal Relative Humidity (optional)

Sensor: Honeywell HIH-4000-001

Interchangeability: 0-59% RH ±5%

60-100% RH ±8%

Resolution: 0.5% RH

Accuracy: ±5% RH

Hysteresis: 3% RH

Repeatability: ±0.5%

Resistance

Range: 10Ω to 100Ω

Resolution: 1Ω

Accuracy: ±5%

Range: 100Ω to 100KΩ

Resolution: 10Ω

Accuracy: ±1%

Range: 100KΩ to 1GΩ

Resolution: 1KΩ

Accuracy: ±5%

Voltage

Range: 0Vto5V

Resolution: 100mV

Accuracy: ±5%

A3 JB Data Acquisition Unit

Applications

Features

Functional Specifications