Temperature / Humidity Thermistor Instrument


The SRH77A features include a backlight display for dark environments, sealed keypad which protects the instrument from spills and dust, and a battery eliminator jack. 3-Zone. Min/Max memory.


The auto shut-off begins after 15 minutes of non-use or continuous ON mode. It features temperature differential between zones 1 and 2 , %RH and wet bulb. The Constant Scan feature records the min/max temperature from three probes allowing the technician to monitor critical temperatures remotely while completing other tasks. The SRH77A Includes: Model 1075 General Purpose Puncture Probe, Model 4011 Pipe Strap Probe, and Model 5028 Humidity Probe.


  • Backlight display
  • Temperature differential between zones 1 & 2
  • Rugged Hard Carrying Case
  • Auto shut-off after 15 minutes of non-use or continuous ON mode
  • % RH and Wet Bulb
  • 3 Zones
  • F/C Switchable
  • Min / Max memory
  • Factory Calibrated


Temperature Accuracy Fahrenheit±0.3°F or ±0.5% Reading, whichever is greater
Battery Type9V Alkaline
Resolution0.1°C/F, 1% RH
CertificationsCE, RoHS, WEEE
Weight1lb 5oz / 595g
Dimensions9.5" x 6.5" x 3 .5" / 241 mm x 165 mm x 89 mm
Temperature Range Celsius-40°C to 150°C
Temperature Range Fahrenheit-40°F to 300°F
WarrantyInstrument: 5 Years ; Probe: 1 Year


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