Brannan Digital Max Min Greenhouse Thermometer - Greenhouse Temperature Monitor to Measure Hi and Lo Temperatures In Greenhouse Garden or Home - Easily Wall Mounted Greenhouse Accessories These large display, digital max min thermometers simultaneously display the actual temperature whilst displaying the maximum and minimum temperatures. Our greenhouse temperature monitor measure temperature over the range of -10 to 40 °C with a 0.1 °C resolution and are ideal for recording temperatures of greenhouses etc. The units are housed in either a white or green ABS case measuring 30 x 50 x 180 mm. The instrument incorporates a keyhole slot for hanging.