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8" (203mm) Temperature Chart Recorder

The KT856 has a full 8" (203mm) chart, two K-Thermocouple probes, digital display, alarms, and relay contacts. The KT856 is our most feature rich temperature chart recorder.

  • Two K-Thermocouple Probe
  • Digital Display
  • Alarms
  • Relay Contacts
  • User selectable recording times and temperature ranges

For use above 500F (260C) A203 required.

  • Note: Immersion and Piercing Probe displayed in product photos are accessories to the unit, and do not come standard.
  • Note: 31 Day chart is not available for temperature ranges [-20 to 20] and [0 to 150]
Calibration Method

Calibration ensures Regulatory and Audit Compliance

Kt856 front 699
Kt856 lft angle 597
Kt856 rt angle 510
Kt856 lft side 457
Kt856 rt side 338
Kt856 back 210
Kt856 probe 159
Kt856 w a203probes 1203
Kt856 w d605probe 1204

Download Images: Print Quality | Hi-Res

Important Information

Charts are sold separately.

Dickson Expert Services

Our Dickson Data Division has specially trained representatives to address the needs of customers with large installations or unique demands. Please call 888-452-4626.

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Description 8" (203mm) Temperature Chart Recorder with Replaceable Sensor, and Display Touchscreen Logger with USB Download Touchscreen Logger - WiFi/Ethernet
Price $545.00 $424.00 $524.00
Remote Probe Icon compare check Icon compare check Icon compare check
  • Audible
  • Visual
  • Audible
  • Text/SMS
  • Visual
  • Phone
  • Email
Temperature Range Icon question
  • -50.0 to 50.0F/C
  • -20.0 to 20.0F/C
  • 0.0 to 100.0F/C
  • 0.0 to 150.0F/C
  • 0.0 to 250.0F/C
  • 0.0 to 500.0F/C
  • 0.0 to 1000.0F/C
    (0.0 to 2000.0F)
  • 50.0 to 150.0F/C
Temperature Accuracy
  • +/-1.8F from -22.0 to 122.0F 3.8F
    (+/-1.0C from -30.0 to 50.0C 2.1C)
DicksonOne Compatible
Icon question
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Add to Cart Add to Cart Add to Cart
  • Alarm Type Audio/Visual on High/Low Temp Limits
  • Ambient Operating RH Conditions 0-95% RH non-condensing (Recorder Only)
  • Ambient Operating Temperature Conditions 32.0 to 122.0F (0.0 to 50.0C)
  • Approvals CE
  • Battery Backup Four AA Batteries. Powers unit for up to 3 Days.
  • Battery Life (Avg) 72 Hours (Back-up Only)
  • Calibration Options N100, N300, N400
  • Channels CH1: Temperature, CH2: Temperature
  • Chart Rotation Speed 24 Hour, 7 Day, 31 Day
  • Dimensions 3.1 x 9.2 x 9.2in
  • Display Dimensions Height 1.375
  • Display Dimensions Width 2.0
  • Display Resolution 0.1
  • Display Type LCD
  • Enclosure Rugged Black ABS Case, Polycarbonate Door, Aluminum Dial
  • IP Rating 20
  • Included Accessories AC Adapter, Red Pen, Four AA Batteries, Quick Start Guide and Two 4' Bead-Wire Probes. *Charts sold separately.
  • Keypad Functions Power On/Off, Pen Home, Alarm
  • Mounting Options Free Standing or Wall Mounted
  • Note on Relay Type Relay does not function while unit is running on only battery power.
  • Power Cord 6 ft
  • Power Source 120 to 240 VAC, 12 VDC (INTL fittings available); AC Adapter
  • Power Status Indicator LED Indicator
  • Relay Connection Spade Lugs, Male 0.25. One Relay per Channel.
  • Relay Type SPST, 24 VDC, 0.5 A, N/O
  • Remote Sensor Length 4
  • Remote Sensor Type 2 K T/C with Mini Connectors
  • Response Time 30 Seconds to 63% of Full Scale
  • Temperature Accuracy +/-1.8F from -22.0 to 122.0F 3.8F Remaining (+/-1.0C from -30.0 to 50.0C 2.1C Remaining)
  • Temperature Range Help-50.0 to 50.0F/C; -20.0 to 20.0F/C; 0.0 to 100.0F/C; 0.0 to 150.0F/C; 0.0 to 250.0F/C; 0.0 to 500.0F; 0.0 to 1000.0F/C; 0.0 to 2000.0F; 20.0 to 100.0F/C; 50.0 to 150.0F/C
  • Temperature Sensor 2 Remote Probes
  • Unit Weight 9 lbs
  • Units/Pkg 1
  • Warranty 12-Month Limited
Why should I calibrate?

All instruments lose accuracy over time due to normal usage and the environmental conditions to which they are exposed.

How often should I calibrate?

For most applications, the recommended calibration interval is every twelve months.

N100 1-Point NIST Traceable Calibration $99.00 Add
N300 3-Point NIST Traceable Calibration $156.00 Add
N400 3-Point Ultima NIST A2LA Accredited Calibration $269.00 Add
What is NIST Calibration?

NIST stands for the National Institute for Standards and Technology. This organization is responsible for maintaining the master for different measurements, such as the standard "foot", standard, "second", or standard "pound". NIST also maintains the standard for temperature, humidity and pressure.

NIST Traceable means that the measuring standard can be traced directly back to the master standard maintained by the NIST organization.

NIST-Traceable does not tell you the measurement accuracy of a metrologty service in any detail. Only metrology services that can document their ISO 17025 standard provided data on their best measurement uncertainty.

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Piercing Probe

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Shielded Immersion Probe

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Probe Extension

K-Thermocouple 10' (3m) Extension Cable

Thermocouple Extension

K-Thermocouple 100' (30m) Extension Cable

Temperature Probe

Replacement Bead Wire Temperature Probe

Universal Plug Kit for AC Adapter

Set of Three International Power Plugs for AC Adapter

AC Adapter

AC Adapter

C406 8" (203mm) Chart 31-Day, -50 to 50 $54.00 Add
C407 8" (203mm) Chart 31-Day, 0 to 250 F/C $54.00 Add
C408 8" (203mm) Chart 31-Day, 0 to 500 F/C $54.00 Add
C409 8" (203mm) Chart 31-Day, 0 to 100 F/C $54.00 Add
C410 8" (203mm) Chart 24-Hour, 0 to 100 $54.00 Add
C411 8" (203mm) Chart 24-Hour, -50 to 50 F/C $54.00 Add
C412 8" (203mm) Chart 7-Day, 0 to 100 $54.00 Add
C414 8" (203mm) Chart 7-Day, -50 to 50 F/C $54.00 Add
C425 8" (203mm) Chart 24-Hour, 0 to 150 or 0 to 0.15 F/C $54.00 Add
C428 8" (203mm) Chart 24-Hour, 0 to 500 F/C $54.00 Add
C432 8" (203mm) Chart 24-Hour, 0 to 250 or 0 to 0.25 F/C $54.00 Add
C435 8" (203mm) Chart 7-Dday, 0 to 150 or 0 to 0.15 F/C $54.00 Add
C439 8" (203mm) Chart 7-Day, 0 to 250 or 0 to 0.25 F/C $54.00 Add
C440 8" (203mm) Chart 7-Day, 0 to 1000 F/C $54.00 Add
C441 8" (203mm) Chart 24-Hour, 0 to 1000 $54.00 Add
C443 8" (203mm) Chart 24-Hour, 0 to 2000 F $54.00 Add
C444 8" (203mm) Chart 7-Day, 0 to 2000 F $54.00 Add
C445 8" (203mm) Chart 24-Hour, -20 to 20 F/C $54.00 Add
C448 8" (203mm) Chart 7-Day, -20 to 20 F/C $54.00 Add
C459 8" (203mm) Chart 7-Day, 0 to 500 F/C $54.00 Add
P266 3 Red, 3 Blue - 2 Channel Temperature $58.00 Add

Frequently Asked Questions

  • Try slower, firmer key presses.
  • Maybe the unit is locked up. If the chart recorder is locked up there will be no response to button presses, however, the unit may appear to be working, but the readings won't change and the chart will not rotate. To correct this, remove ac and battery power then re-power.
  • Check AC adapter connection

Probe not plugged into recorder.

Plug K-thermocouple into back of recorder

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  • When the backup battery is low, the LED will flash red until the battery has been replaced.

Pen adjust may be needed if the pen(s) and display do not match.  Before proceeding check your calibration date, the unit may be due for a recalibration, if so contact Dickson.

While the unit is on, press and hold both the Pen Home button and the On/Off button (making sure to press the Pen Home button first so the unit will not turn off). The led will blink rapidly between amber and green for about five seconds, the LED will then turn green, release the Pen Home and On/Off buttons. The led will flash amber and green for one second and the led will turn off.

One pen model: The red pen will move to the outer edge of the chart and is ready to be adjusted. Use the Adjust-Up and Adjust-Down buttons to move the pen to the maximum temperature line on the chart. Once the pen is set, the Pen Home button will move the pen to reaffirm the new pen position. Press the On/Off button to exit pen home adjust.

Two pen models: Both pens will move to the outer edge of the chart, and then the shorter red pen will move to the current position. Use the Adjust-Up and Adjust-Down buttons to move the pen to the maximum temperature line on the chart. Once the shorter red pen is set, the Pen Home button will move the shorter red pen to the outer edge of the chart and the longer blue pen will move to its current position. The Adjust-Up and Adjust-Down buttons will adjust the longer blue pen position. Once the pen is set, the Pen Home button will move the longer blue pen to the outer edge of the chart and the shorter red pen will move to its new position. Each time pen home is pressed the two pens will switch positions (moving the most recently adjusted position) until the On/Off button is pressed to exit pen adjust mode.

Note: Pressing the On/Off button will exit the adjustment and return the unit to normal operation. Each time the pen home or On/Off button is pressed, the adjustment currently in progress will be stored. The unit will take one minute to exit Pen Adjust Mode once the On/Off button is pressed.

1. Alarm on or off
2. Pen 1 alarm min
3. Pen 1 alarm max
(if it is a two pen unit the following states also exist)
4. Pen 2 alarm min
5. Pen 2 alarm max

To set the alarm, make sure unit is on and press and hold the Alarm button. The LED will blink red rapidly for about five seconds, and then the led will go solid green. Release the Alarm button and the led will turn red. At this point the display will show the following: ON with a delta symbol, or OFF without a delta

Pressing either the Adjust-Up or Adjust-Down buttons, located on the back of the unit next to the dip switch, will toggle the alarm on/off.

Pressing Pen Home will scroll to the next alarm option. The options are as follows:

In order to set pen alarm minimums and maximums, pressing the Adjust-Up will increase the alarm value, and pressing the Adjust-Down will decrease the alarm value. There is acceleration if the Adjust-Up button is held down. Repetitively pressing the pen home button will scroll through the five options until the alarm button is pressed to exit from alarm adjust. Each press of the Pen Home or Alarm button will store the new settings. The unit will take one minute to exit Alarm Set Mode once the Alarm button is pressed.

If the alarm is triggered, ALRN will show on the display, the led will show as solid red and the alarm will sound. Press the Alarm button to silence Audible Alarm.

Solid Green - AC Power with Battery Backup
Blinks Red - AC Power with Low Battery or No Battery

Blinks Green - Battery Only
Solid Red - Battery Only (Low Battery)

  • Use the "on/off" and "adjust up" buttons if the "on/off" and "adjust down" buttons don't work.
Make sure the unit is in Fahrenheit when setting the alarm for the first time. Switch to Celsius and reset the alarm parameters.

The green LED flashes only occasionally to preserve battery life.

Response time is slower to preserve battery life.

No, there is no way to disable one of the channels.

The cause of this could be because Hysteresis or wrong chart.

Hysteresis is a naturally occurring mechanical discrepancy up to 2% of range

Make sure the proper chart is installed and that dipswitches are set for that chart.


Dip switches set for a specific range, but using chart for another range, or vice versa.

Pen(s) not inserted on pen arm(s) all the way

Pen home not set properly. To check and adjust PEN HOME setting, press and hold the Chart Rotation and Alarm button, then press the On/Off button. Hold down all three buttons until the unit comes on, the light should be flashing amber. When the amber light becomes steady, press the Alarm button twice, the light should alternate between Red and Green and the pen will move toward the top of the chart. The pen should stop on the Maximum temperature line of whatever chart is being used. If the pen is not exactly on the max temp line, use the Alarm button to move the pen down and the Chart Rotation button to move the pen up. If you have a, you can toggle between the pens by pressing and holding the alarm button until the pens crisscross each other. Turn the unit off then back on to store the settings.

Gears jammed or slipping (You should hear the gears grinding)