solar water heater system: solar water heater for domestic, Certificate: ISO,CE,SGS, we can offer the competitive price solar water heater systemSP116 SP118 technical ... Input signal: 3 temperature sensors (for top of tank, for heat collector, for bottom of tank) 9. Output signal: 3 ... signal: 6 temperature sensors (PT1000 for heat collector, NTC 10k B=3950 for water tank) 8. Output signal: 5 ( ...