SR81 solar water heater intelligent controller, used for split-type solar energy,all devices adopt industrial grade standard, can run freely in cold, high temperature and humid environment With the clock chip at the same time, the timing control is accurate. The controller LCD liquid crystal display, beautiful appearance, stable and reliable performance, easy installation, become the most perfect accessory product for solar . The main function:Single system: (standard solar system 1 collector, 1 water tank).LCD display.CLK time setting.THET timing auxiliary heating.CIRC water end circulation pump three-time temperature or time control function.PWD password input LOAD water tank heating setting.COL collector function.OCEM collector emergency shutdown function.OCCO collector cooling.OCMI collector minimum temperature.OCFR collector antifreeze function.COOL cooling function.OSTC tank cooling.OHDP heat transfer function.AH automatic temperature adjustment function.BEEP buzzer fault alarm function.MAN manual function.BLPR blocking protection.OTDI high temperature function. flow monitoring and pump idling protection.UNIT conversion between Celsius and Fahrenheit.RET reset PASS password setting.M.H manual heating.Economic model.Manual start with water circulation pump.Holiday function.Protective function.Power failure memory protection.screen protector Power input: AC100...240V -(50...60Hz) Rated pulse voltage: 2.5KV Installation: wall mounted Run: 10 push buttons on the front of the panel Protection category: IP40 Electric heating 1500W Ambient temperature: -10-50oC Temperature measurement accuracy: 2 Celsius Temperature display: 0.1 Celsius Collector temperature range: -10 - 220 Celsius Water tank or pipeline temperature range: 0 - 110 Celsius Input signal: 1 PT1000 temperature sensor input 4 NTC10KB=3950 temperature sensor inputs 1 rotary vane electronic flowmeter (FRT) Output signal: 3 electromagnetic relays, maximum switching current 2A colour:white Material:plastic size:1500W main controller Dimensions: 200x140x43mm PT1000 sensor : 6x50mm Line length: 1.5 meters NTC10K specification: 6x50mm Package Contents: 1x controller 1x English manual 1xPT1000 sensor 2xNTC10K 1x10A power cord Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm. Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell or email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!