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/time control function.PWD password inputLOAD 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 transferfunction.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 resetPASS password setting.M.H manual heating.Economic model.Manual start with water circulation pump.Holiday function.Protective function.Power failure memory protection.screen protectorPower input: AC100...240V ~(50...60Hz)Rated pulse voltage: 2.5KVInstallation: wall mountedRun: 10 push buttons on the front of the panelProtection category: IP40Electric heating 1500WAmbient temperature: -10-50oCTemperature measurement accuracy: +/- 2 CelsiusTemperature display: 0.1 CelsiusCollector temperature range: -10 ~ 220 CelsiusWater tank or pipeline temperature range: 0 ~ 110 CelsiusInput signal: 1 PT1000 temperature sensor input4 NTC10KB=3950 temperature sensor inputs1 rotary vane electronic flowmeter (FRT)Output signal: 3 electromagnetic relays, maximum switching current 2Acolour:whiteMaterial:plasticsize:1500W main controller Dimensions: 200*140*43mmPT1000 sensor : 6*50mmLine length: 1.5 metersNTC10K specification: 6*50mmPackage Contents:1* controller1* English manual1*PT1000 sensor2*NTC10K1*10A power cordOnly 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/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 hoursHope you have a pleasant shopping experience!