SC250 Receiver / Logger

The SC250 is the hub of the secure logging system, for use with Eltek's Darca Secure software. It is not necessary to have a permanently connected PC and the built-in battery means data logging is not interrupted if there is a temporary AC supply failure. Alarms are included as standard (SMS and local) and include grouping so that alarms for individual departments can be configured.


  • Data Logger with integral receiver
  • Alarms are logged
  • Data is checksummed to prevent corrupted data from being downloaded
  • 247K readings expandable to 2M readings
  • Alarm raised if external power removed (e.g. mains failure)
  • Grouping for alarm text messages
  • 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.
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, Ethernet, internet and GPRS
Alarm: SMS + 1 contact closure


Product datasheet:

GenII Secure Data Logging System