The CL-355A is a small, lightweight, portable dry block calibrator, that offers fast heat-up and cooldown times with excellent performance specifications at a wide operating temperature range. It’s a good choice for standard bench lab work or as a portable field unit. The unit covers the temperature range from 5°C (9ºF) above ambient up to 400°C (752ºF) using a large multi-well machined aluminum insert block as the heat transfer medium to the sensors under test. The CL-355A uses the same aluminum inserts as the CL-740A calibrator. This calibrator is designed to work safely under the following conditions: ambient temperature range: 5 to 40°C (9 to 104°F), up to 95% relative humidity, non-condensing.

SPECIFICATIONS 
Minimum Temperature: 5°C (9°F) above ambient 
Maximum Temperature: 400°C (752°F) 
Cooling Rate,400 to 100°C(752 to 212ºF): 21 min 
Heating Rate, 20 to 400°C(68 to 752ºF): 12 min 
Independent Over-Temperature Cutout: 450°C (842ºF) approx. 
Fan Cooling: Automatic 
Display Resolution: 0.1° 
Weight: 4 kg (9 lb) 
Insert Immersion Depth: 4.5 
Dimensions: 222.25 H x 203.2 W x 203.2 D mm(8.8 x 7.9 x 7.9") 
    Stability After 15 Min:: ±0.15°C (±0.27ºF) 
    Display Accuracy: : ±0.6°C (±1.1ºF) 
Well to Well Uniformity: 0.015 to 0.025°C(32.02 to 32.04ºF)