Cooper SRH77A Digital Temperature Humidity Instrument Kit w/ Case Instructions

Up for sale is a Cooper-Atkins SRH77A digital temperature and humidity meter, a workhorse instrument for HVAC/R diagnostics, refrigeration service, building inspections, greenhouse and storage monitoring. This is the same 3-zone meter the pros carry — it measures two thermistor probe zones plus relative humidity, and calculates wet bulb and temperature differential (Delta-T) for superheat and return-air wet bulb testing.Key features:• 3-zone monitoring: T1, T2 temperature probes + T3 relative humidity• Temperature range -40°F to 300°F (-40°C to 150°C), switchable °F/°C• Humidity range 10% to 95% RH• Accuracy ±0.3°F or ±0.5% of reading; 1% RH resolution• Backlit 4-digit LCD display• Min/Max memory, scan mode, auto shut-off• Sealed keypad for dust and spill protection• Runs on a single 9V batteryWhat’s included:• SRH77A instrument• Original rugged blue hard carrying caseNOT included: probes — no thermistor probes or humidity probe come with this listing. The meter itself is all you get, plus the case. It uses standard Cooper-Atkins thermistor probes (models 1075, 4011, 5028 etc.) if you want to add them later.Condition: Used, in good working condition — see photos for exact cosmetic condition. Case shows normal light wear from truck use, latches and handle intact. Sold as-is with no probes, no battery guarantee, no returns.Ships fast and packed carefully. Check out my other listings for more HVAC tools and test equipment.