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The Grant Instruments Optima GR150 series of digitally controlled refrigerated baths and re-circulators provides outstanding performance for routine and sophisticated applications requiring accurate temperature control in the range of -47 to 100 degC. Grant Instruments GR150 series refrigerated systems combine the powerful and versatile Grant Instruments Optima digital immersion thermostat GR150 with a choice of five rugged stainless steel refrigeration units with different facilities and working volumes.

The GR150 immersion thermostat incorporates Intelligent Control Optimisation (ICO) for adaptive intelligent PID temperature control and includes a powerful integral pump, making GR150 series refrigerated systems suitable both for immersing samples and circulating temperature controlled fluid to external devices. The temperature range and heater power are automatically limited according to the liquid type selected.

The GR150 control unit has a host of powerful and convenient programming features for optimum application flexibility. These include a convenient heater timer for early starts/late shutdowns, a programmable relay for switching external devices on/off, option for remote temperature monitoring, RS232 interface for PC communication and data collection, and memory capacity for one program of up to 30 segments.

  Simple-to-use rotor plus two keys provide access to the interactive interface for fast, accurate set-up
  Dual display: bright LED for temperature display plus 2-line 16 character LCD for easy programming
  Twin heaters, 2kW heater power for fast heat up
  Pt1000 external probe socket for remote monitoring
  Powerful integral pump, maximum flow 17L/min
  Operating setpoint plus 3 adjustable preset temperatures for convenience
  User calibration facility for optimum accuracy at the required operating temperature
  Variable high and low temperature alarm settings - configurable to switch a relay
  Visual and audible alarm - alert you when your attention is required
  Choice of five operator languages
  Choice of five refrigerated (R) tanks with different facilities, working volumes and cooling capacities
  Cooling/heating range: -47 to 100 degC (dependent on refrigeration unit selected)
  Stability +/- 0.1 cegC
  Models include GR150-R1, GR150-R2, GR150-R3, GR150-R4 and GR150-R5.

Note: The refrigeration unit can be switched off indepedendently of the thermostat to allow heating only applications. All the refrigeration base units can be used up to a maximum temperature of 100 degC.

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