Alltronix International Inc

Temperature Measurement/Operating Range: -40 º C to +60 º C (-40 º F to +140 º F) (NIST traceable if ordered with certificate)
Temperature Resolution or precision: 0.1 º C (0.18 º F) and 0.5 º C (0.9 º F)
Temperature Accuracy: +/- 0.5 º C (+/- 0.9 º F) over 0 º C to +60 º C (32 º to 140 º F) and +/- 1 º C (1.8 º F) over remainder of temperature range
Relative Humidity Measurement Range: 0 to 100 % RH (NIST Traceable)
Relative Humidity Longterm Operating Range: < 90 % RH (non-condensating)
Relative Humidity Resolution or precision: 0.1 % RH and 1 % RH
Relative Humidity Accuracy: +/- 3 % RH between 10 % RH to 90 % RH and +/- 5 % RH below 10 % RH and above 90 % RH
Relative Humidity Long Term Stability: < 1 % RH/year
Maximum measurement rate: one reading every second
Housing Dimensions: 8 cm (3.1") x 4 cm (1.6") x 2 cm (0.8")
Housing Material: injection molded ABS thermoplastic
Housing Colour: light gray
Sensor type: semiconductor
Communications connector: 8 position modular jack, (accepts 8 position plug RJ45)
Power source: Port-powered (RTS and or DTR, asserted) or via External DC power connector
Power supply current drain:  1.5 mA average, 6 mA maximum when port powered (5V RS232)
External DC power connector: 2.1 mm power jack, automatic polarity correction and over-voltage protection.
External power supply voltage: 6.0 - 12.0 VDC
Communications Interface: RS232C using TX,RX,RTS,DTR and GND. One device per serial port.
Maximum communications cable length: 305 m (1000 ft.) using recommended cable type. Low capacitance shielded cable or UTP is recommended.
Firmware Version: 6.5
Communications Protocol: Sensorsoft Device Protocol (SSDP) Version 2.1 or Simple Text Commands Interface (r,m,v)
Error control:  16 bit CRC (cyclic redundancy checking) for detection of communication errors between this device and host. (SSDP only)