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Grant Instruments

LTC4 Refrigerated Circulating Bath Kit

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The TX150 - R4 is available as a kit with the circulator, refrigeration unit and insulated tubing and clips to form a system ready to use.The Grant Optima™ LTC4 Kit includes TX150 heating circulator and R4 tank/refrigeration unit:


  • 20 litre tank with drain tap
  • refrigeration high pressure switch
  • relay control for refrigeration on/off*
  • cooling power 500W @ 0°C
  • temperature range -30 to 100°C

The Grant Optima™ TX150 series of digitally controlled refrigerated circulating baths provides outstanding performance for routine and sophisticated applications requiring accurate temperature control in the range of -47 to 100°C.

Grant GR150 series refrigerated systems combine the powerful and versatile Grant Optima™ digital heating circulator TX150 with a rugged stainless steel refrigeration unit with different facilities and working volumes.

The Grant Optima™ TX150 is high-performance programmable digital heating circulator with an exceptionally simple user interface. This allows fast set-up of multiple parameters through a powerful menu system and provides sophisticated control for temperature-controlled applications. The TX150 has USB connectivity to a PC or laptop. It is programmable with Labwise™, a software program to set all parameters, including programs, via the PC. Labwise™ also features real-time status windows, a graphic display of the controller's performance as a program is run, and allows data to be logged for future recall and analysis.

  • Powerful pump for external circulation, maximum flow 18 L/min, maximum pressure 310 mbar
  • Full colour QVGA TFT diplay
  • Setpoint, plus three adjustable preset temperature values
  • Timer function for reaction timing, 99 hours, 59 minutes, with audible alert and heater control
  • Liquid selection safety feature adjusts for temperature range or heater power
  • Fault indication display
  • Programmable relay
  • Two-point user recalibration of internal and external probes (TXPEP, TXSEP)
  • Off-set adjustment for optimal isothermal performance
  • USB connectivity
  • Optional Labwise™ PC software for program set-up, data-logging and real-time graphing
  • Can be programmed to switch the refrigeration on and off during a heating and cooling program
  • Memory capacity for one program of up to 30 segments

Comes with a 4 year manufacturer's warranty.

FeatureLTC4 (Digital High Performance)
Stability (DIN 12876) water @ 10°C± 0.1
-10°C for 50% water, 50% glycol °C± 0.1
Uniformity (DIN 12876) water @ 10°C± 0.1
-10°C for 50% water, 50% glycol °C± 0.1
Setting resolution °C0.1 (0.01 with Labwise™)
Displayfull colour QVGA TFT
Timer function1 min to 99 hrs 59 mins
No. stored temperature values3
Two point re-calibrationYes
Offset adjustmentYes
Socket for external probe (TXPEP,TXSEP)Yes
Communications interfaceUSB & RS232
Programmableremote via PC/laptop
No. stored programs1 x 30 segment
Safety overtemperatureadjustable cut-out
fluid level - float switchYes
Alarms (can be configured to switch a relay)high and low
Heater power 230 V kW1.9
120 V kW1.4
Electrical power 230 V kW2.0 (50 Hz)
120 V kW1.5 (50-60 Hz)
Height above tank rim mm200
Depth below tank rim mm135

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20L Refrigeration unit -30°C kit
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