The Spirax Sarco LC1350 conductivity level controller is an on-off level control and alarm device designed specifically for conductive liquids. It accepts conductivity sensor inputs, supports boiler conditions up to 32 bar g and 239 °C, and provides 2 independent relay outputs. The controller can be panel, DIN rail, or baseplate mounted, with a front panel protection rating of IP65. It is primarily used for industrial boiler feedwater level control, condensate recovery tanks, and automatic level regulation with high/low alarms in industrial tanks.
LC1350 Product Photo
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Spirax Sarco LC1350 Conductivity Level Controller (Pump Control with High and Low Alarms)
Conductivity level controller for pump control and high/low alarms in boilers and tanks.
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Specifications
- Supply Voltage
- 110-240 Vac, 50/60 Hz
- Maximum Power Consumption
- 7.5 W
- Minimum Fluid Conductivity
- 1 μS/cm at 25 °C
- Applicable Operating Conditions
- Up to 32 bar g at 239 °C (boiler)
- Relay Output
- 2 × SPCO, resistive 3 A @ 250 Vac, inductive 1 A @ 250 Vac, motor 1/4 HP @ 250 Vac, pilot C300 (2.5 A)
- Ambient Temperature Range
- 0 to 55 °C
- Maximum Altitude
- 2000 m
- Overvoltage Category
- III
- Pollution Degree
- 2 (as supplied), 3 (installed in enclosure, minimum IP54)
- Front Panel Protection Rating
- IP65 / NEMA 4
- Input Type
- Conductivity sensor, AC-pulse driven, single or dual probe
- Infrared Communication
- IrDA, 38400 baud, 10 cm, 15°
- Maximum Sensor Cable Length
- 100 m
- Terminal Wire Size
- 0.2 mm² (24 AWG) to 2.5 mm² (12 AWG), stripping length 5-6 mm
- Mounting Method
- Panel, DIN rail, baseplate
- Housing Material
- Polycarbonate
- Front Panel Material
- Silicone rubber, 60 Shore
- Certifications
- UL, TUV, EN 61010-1, UL61010-1, CAN/CSA-C22.2 No. 61010-1
Application scenarios
Industrial Boiler Feedwater Level Control with High and Low Level Alarms
The LC1350 can be used for boiler water level control, providing on-off level regulation by operating a pump or solenoid valve, and offering two independent alarm channels that can be set as high or low. Suitable for boiler conditions up to 32 bar g and 239 °C.
Condensate Recovery Tank Level Control
The LC1350 can be used for level monitoring in condensate recovery tanks or storage tanks, providing automatic level control by operating a pump or solenoid valve. It is suitable for conductive condensate with a minimum conductivity of 1 μS/cm (25 °C).
Industrial Tank and Conductive Liquid Vessel Level Control
The LC1350 can be used in industrial tanks or vessels containing conductive liquids, providing on-off level detection via single or dual conductivity probes, and controlling pumps, solenoid valves, and high/low level alarms.
FAQ
What principle does the LC1350 level controller use to control boiler or tank water level?
The LC1350 detects changes in the conductivity of conductive fluids and controls pump start/stop or alarms via relay energization or de-energization. When used with the LP10-4, it functions as an on-off level controller.
What liquids and operating conditions is the LC1350 suitable for?
Suitable for conductive fluids such as salt solutions, boiler water, and condensate. When used with the LP10-4, the minimum conductivity is 1 μS/cm at 25 °C. It can be used in vessels, tanks, and high-load boilers.
What functions are the single-probe and dual-probe inputs of the LC1350 used for?
A single conductivity sensor input can be used for high or low alarm; two conductivity sensor inputs can be used for pump on/off control. Specific configuration must be confirmed based on the actual model and application conditions.
What mounting methods and environmental requirements does the LC1350 have?
It can be panel, DIN rail, or baseplate mounted, and should be installed in a suitable industrial control panel or fireproof enclosure. The device is for indoor use only; if installed outdoors, additional climatic protection measures are required.
What maintenance and inspection does the LC1350 require?
The controller itself requires no special servicing, preventive maintenance, or product inspection, but boiler water level control and alarm functions should be tested and inspected according to site requirements. The device is of sealed construction and should not be opened by the user.