RX250AL Receiver / Logger

The RX250AL Receiver logger is the heart of a GenII logging system. Because the RX250AL is responsible for receiving and storing the data, it is not necessary to have a PC permanently connected. The built-in battery means data logging is not interrupted even if there is a temporary AC mains failure. Multiple RX250ALs can be used for wide area coverage. Alarms (including SMS alarms) come as standard. (To use SMS alarms, a GSM modem is required).


  • Data Logger with integral receiver
  • Alarm and GSM text output
  • 24 hour built-in standby battery
  • 247K readings expandable to 2M readings
  • Dual RS232 serial ports
  • Transmitter battery alarm
  • Display and keypad for "online" metering
  • Extensive communications options




GSM Modem kit (logger / receiver side)

The kit consists of the following:

  • Wavecom Xtend modem
  • Mounting tabs
  • Logger to modem lead (type GSM-mdm-com2X)
  • Antenna with 1.8m lead
  • SMA connector
  • User instructions

When installed, access to the Squirrel can be achieved via a GSM network.
Note: GSM connectivity is not available with Darca Lite software.
A SIM card from the Network Service Provider is required.
The kit is necessary for text messaging functionality.




GSM Modem kit (PC side)

The kit consists of the following:

  • Wavecom Xtend modem
  • Antenna
  • Modem to PC serial lead (type LC-PC/MDM)
  • AC to 12V DC power supply (type MPGSMextend)
  • User instructions






UHFflexi/SMA standard quarter wave whip

LW-ANT/SMA lightweight indoor or external dipole antenna

Yagi directional antenna


Number of channels: Up to 250
Number of transmitters: Up to 125
Ambient temperature: -10 to +55°C
Humidity: Up to 95% (non condensing)
Power supply: 12V DC at 500mA powered using type MP12U, (input 100-250V AC)
Built-in batteries: 6 x AA Ni Mh battery
Backup battery life: Typically 24 hours
Memory: 247,000 readings expandable to 2,000,000
Clock accuracy: 1 second/day at 20°C
Dimensions: D 60mm x W 180mm x H 120mm
Weight: 1Kg inc. batteries
Case material: Scratch resistant Nextel coated ABS
PC/modem interface: RS232C up to 38.4K Baud
Receiver: Crystal controlled
Sensitivity: UHF: -117dBm
Antenna connector: SMA 50 ohm female
Antenna: Quarter wave standard, lightweight dipole optional
Communication options: USB, GSM and Ethernet
Alarm: RX250AL: SMS + 1 contact closure, RX250ALD: SMS + 2 contact closures


Product datasheet:

GenII Telemetry system datasheet