• LTC4 Refrigerated Circulating Bath

    The Grant LTC4 provides outstanding performance for routine and sophisticated applications requiring accurate temperature control in the range of -30 to 100°C. The LTC4 includes the TX150 heating circulator and an R4 tank/refrigeration unit, complete with insulated tubing and clips to form a system ready to use.

    The TX150 Optima™ 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.USB connectivity is available 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 display
    • 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
    • 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
    • Choice of languages: English, French, German, Spanish and Italian
    • Low liquid protection by float switch
    • Adjustable over-temperature cut-out
    • Convenient accessory clamp available for fitting to vessels
    • Stability ± 0.1°C

    Note: The refrigeration unit can be switched off independently of the circulator to allow heating only applications. All the refrigeration base units can be used up to a maximum temperature of 100°C.


    • University research/teaching – temperature control of external equipment including: spectrophotometers & refractometers
    • Circulation of temperature control fluid to jacketed vessels, cooling crystallisation vessels
    • Industrial laboratories – temperature probe calibration, product testing, product QC, temperature control of external equipment


    Dimensions (h x d x w) 755 x 515 x 390mm
    Capacity 20L
    Temperature range -30 to 100ºC
    Refrigerant R134a
    Working Area (d x w) 230 x 305mm
    Min/Max liquid level 85/140mm
    Cooling power (typical) @20ºC 900W
    Cooling power (typical) @0ºC0W 500W
    Cooling power (typical) @-10ºC 300W
    Cooling power (typical) @-20ºC 180W
    Cooling power (typical) @-30ºC 40W
    Electrical power (max) 120V 2280W (50-60Hz)
    Electrical power (max) 230V 2850W (50Hz)
    Relay control (of refrigeration system or external device)
    Weight 42.9kg


    Product Manuals:


    Further Information:



    Vertical Turbine Pump

    Low noise, compact design. Supplied with pipe connections and special lid for fitting to tanks, pipe bore 12.7mm.

    Part No


    VTP1-LT Maximum pressure 1000 mbar, Maximum flow 9 L/min
    VTP2-LT Maximum pressure 1650 mbar, Maximum flow 12 L/min

    Accessory Notes

    Required only where application demands a higher pressure than that delivered by the internal pump to maintain flow.

    Heat Exchange Coil

    Attach to a supply of cooling tap water or a refrigerated circulator

    Part No


    CW5 Temperature range: 2ºC above the temperature of the coolant