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150mm Circular 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

£396.00 CTH89-220V

  • Advanced microprocessor Design for reliable operation
  • Backlit LCD alphanumeric display
  • All functions selectable from the front panel
  • Battery backup for operation during power failure
  • Alarm for over and under temperature or humidity
  • Selectable alarm delay
  • Audible and visual alarm indication
  • Probe is field replaceable and calibrated with no special equipment
  • Chart number displayed when time and temperature ranges are selected
  • Selectable single or continuous chart rotation
  • Low battery warning on display
  • Fold away carrying handle
  • Snap-on extra support legs
  • Remote sensor
  • Temperature/humidity or dewpoint/humidity recording
Relative Humidity Measurement Instruments - View related products


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.
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Availability: 1 week
6" Circular Chart Temperature/Humidity or Dewpoint/Humidity Recorder 220 To 240 Vac Operation
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Availability: 1 week
Replacement Red Pen (shelf life is one year)
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Availability: 1 week
Replacement Blue Pen (Humidity)(shelf life is one year)
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Consult Sales  
Replacement Probe with 6 Ft. Cable
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Availability: 1 week
Mix Box of Assorted Charts (5 of each range)
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Availability: In Stock
AA Batteries (pack of 2)
All amounts shown in EUR, GBP, or USD
Note: Each Unit comes with Red and Blue Pens, Box of 100 Assorted Charts, Probe with 4 m Cable, AC Adapter and Instruction Manual.

Part Number Builder

Build Your Part Number Below
Option Descriptions:

(1) Temperature Range select from:
E20120F for -20°F to +120°F
E2050F for -20°F to +50°F
E40110F for +40°F to +110°F
E3050C for -30°C to +50°C
E3010C for -30°C to +10°C
E545C for 5°C to +45°C

(2) Recording Time select from:
12 for 12 Hours
24 for 24 Hours
7 for 7 Days
Note: All combinations may not be valid, check spec sheet for valid part numbers.