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Discontinued -  Chart Recorder, Temperature, Humidity, Dewpoint, AC Power with 48 Hr. Back-Up

CTH89 Series

Circular Chart Recorder for Temperature and Humidity | CTH89 Series

Circular Chart Recorder for Temperature and Humidity

  • Chart number displayed when time and temperature ranges are selected
  • Selectable single or continuous chart rotation
  • Fold away carrying handle
  • Snap-on extra support legs


With Combined 18 Speed and Temperature Ranges and 4.5 m (15') Remote Probe, 115 Vac with 48-Hour Battery Back-Up
Primary Power:
115 Vac, 50/60 Hz, 3.5 W max (220 to 240 Vac, 50/60 Hz optional)
Backup Power: 8 "AA" alkaline batteries (included) for 48 hours continuous operation
Temperature Accuracy: ±1°C (±2°F)
Relative Humidity Range: 0 to 100% (non-condensing)
Relative Humidity Accuracy: ±3%
Dewpoint Range: 0 to 50°C (32 to 120°F)
Dewpoint Accuracy: ±1°C (±2°F)
Probe: Combined temperature/ humidity with 4.5 m (15') cable (consult sales for longer cable, 7.6 m (25') max)
Chart: 152 mm (6") circular chart (supplied with 60 assorted charts)
Chart Rotation Speeds:User selectable: 7-day, 24-hr, 12-hr, 6-hr, 3-hr, and 1.5-hr
Chart Rotation: User selectable continuous or single turn
Chart Speed Accuracy: Better than 1%
Display: Alphanumeric backlit LCD, 16 characters x 2 lines
Temperature Alarm Range: -30 to 50°C (-20 to 120°F)
Relative Humidity Alarm Range: 0 to 100% RH
Alarm Delay Range: User selectable, no delay, 10-min, 30-min, 1-hr, and 2-hrs
Remote Alarm Connection: Normally open contacts 48 Vac/Vdc, 0.1 A resistive load
Mounting: Vertical or horizontal free standing or wall mount
Dimensions: 23.5 x 18.4 x 7.0 cm (9¼ x 7¼ x 2¾")
Operating Ambient Temp. Range: 0 to 49°C (32 to 120°F)
Weight: 20.1 kg (4 lb, 7 oz)
Place Order(Specify Model Number)
Part Number/ Desc.
Quick Ship
Availability: 1 week
Replacement Blue Pen (Humidity)(shelf life is one year)
Quick Ship
Availability: 1 week
Mix Box of Assorted Charts (5 of each range)
All amounts shown in EUR, GBP, or USD