Skip to search Skip to main content Skip to navigation

Need assistance? Call us: 1-800-663-4209

We noticed you are in , please visit your local site by clicking the below link for regional offers and support.

CTXL-Series

Portable/Wireless Universal Circular Chart Recorder

Models In Stock
  • Large 8″ (200 mm) dual-channel circular chart with backlit LCD keeps readings clear and legible in any condition
  • Choose 1, 7 or 32 day chart speeds to match your monitoring interval and reduce chart changes
  • Accepts a broad range of sensor types: temperature/humidity, dual thermocouples, or dual process voltage/current
  • High/low audible-visual alarms plus dual relays and voltage outputs give built-in system protection and external control


The CTXL Series recently received a hardware upgrade. If there's an issue with the probe during use, please refer to the link at the bottom of the page under 'Software and Drivers' to download the firmware update.

CTXL-Series
From $ 2,468.14
Models In Stock
Portable/Wireless Universal Circular Chart Recorder CTXL-Series CTXL-Series
loading all models
Product Overview
  • Alarm Note Alarm Audible: Piezoelectric beeper
  • Approvals FCC, Class A
  • Battery Size and Type Alkaline
  • Chart Diameter 203 mm
  • Chart Note Chart Drive: Stepper Motor
  • Chart Speed 1, 7, 32 Days
  • Control Output 2 SPDT Relay, 2 Voltage Pulse
  • Display Note Custom, 4-digit, dual LCD with backlight
  • Display Type LCD
  • Mounting Benchtop or Wall Mount
  • Number of Relays 2
  • Operating Temperature, Max 49 °C
  • Operating Temperature, Min 0 °C
  • Pen Type Pen Lift
  • Pen Type Note Pen Drive:Type: Stepper motor, linear screw drive, Deadband: 0.5°C or °F and 3% RH, Pen Lift: Automatic on door opening—pens are door mounted and swing, clear of the chart when door opens
  • Recording Color White
  • Recording Note Out-of-Range Input: Display will flash. Chart motor will continue to run
  • Relative Humidity 2 to 98% RH
  • Response Time 350 ms
  • Sampling Rate 2 to 120 sec
  • Series ID CTXL-Series
  • Supply Power Type AC, Battery
  • Supply Voltage 100 to 240 Vac
  • Wireless Range Note Outdoor Line-of-Sight: 90 m; Indoor/Urban : 33.5 m

Supported Applications

The Omega CTXL Series is a portable, universal circular chart recorder designed for process measurement and control applications. The series supports multiple input configurations including temperature/humidity monitoring, dual thermocouple inputs (Types J, K, T, E, R, S, B, N), dual process voltage/current signals, pH & RTD measurements, and wireless temperature/humidity sensing via optional transmitters.

Documented application contexts include:

  • Museum and art gallery environmental monitoring
  • Hospital facility conditions tracking
  • Laboratory and clean room environments
  • Computer rooms and office spaces

Operating Conditions & Performance

The CTXL Series operates within an ambient temperature range of -18 to 49°C (0 to 120°F) with a humidity rating of 2 to 98% RH. Storage conditions are specified as -20 to 60°C (-4 to 140°F). The unit features a rugged ABS enclosure and is powered by four D batteries or a universal AC adaptor.

Accuracy specifications vary by model configuration:

  • CTXL-TRH (Temperature/Humidity): ±1.5°C (3°F) for temperature; ±3% RH at 15 to 90% RH, and ±5% RH below 15 or above 90% RH.
  • CTXL-DTC (Dual Thermocouple): ±2°C (4°F) for Type K; ±1.5°C (3°F) for Types J and T.
  • CTXL-DPR (Dual Process): ±1% FS display accuracy.

The recorder provides a large 200 mm (8") circular chart with dual channel LCD readout. Recording intervals are available in 1, 7, or 32 day formats depending on the selected chart paper.

Configuration Options

The series offers configurable options across input types, housing colors, and wireless capabilities. Models are designated by a model number guide: CTXL---.

  • Housing Colors: White or Gray enclosures.
  • Mounting Options: Designed for bench-top operation with a swiveling stabilizing arm, foot cover, and wall mounting kit availability.
  • Sensor Connections: BNC connectors for sensors; mini DIN connector for PC interface (USB/RS-232). Universal thermocouple connectors compatible with standard (OST) and miniature (SMP) plugs are supported on dual thermocouple models.
  • Outputs & Alarms: Dual high alarm relays, dual low alarm voltage outputs, chart paper recording, digital display, and PC interface for data download and real-time monitoring.

Wireless capability is available as an option (e.g., CTXL-TRH-W-W9) requiring a transmitter (CTXL-PT) and receiver (CTXL-PR). Wireless frequencies are specified as 'W9' for USA/Canada (915 MHz) or 'W8' for Europe (868 MHz).

Key Product Differences

The CTXL Series is differentiated by input type, which dictates the specific measurement ranges and accuracy:

  • CTXL-TRH: Temperature/Humidity recorder with integrated or remote sensor probes. Supports wireless retrofitting.
  • CTXL-DTC: Dual Input Thermocouple Recorder supporting Types J, K, T (and others per series overview) with ranges such as -100 to 1000°C (-148 to 1832°F) for Type K.
  • CTXL-DPR: Dual Input Process Recorder accepting Voltage or Current inputs. Models are distinguished by input type (V for Voltage, I for Current).

All models support NIST-traceable calibration and RoHS 2 compliance. The series includes FCC Class A certification.

Accessories

accessories

CAL KIT FOR CT485B NACE
$258.22 / each
0 In Stock
UNIV PWR ADPTR 100-240VAC 9VDC
$55.15 / each
10 In Stock

consumables

24 HR CLOCK, 20/PK, DEG C
$74.42 / each
345 In Stock
1 EA = BOX OF 100 CHARTS, 1 DAY, C
$57.26 / each
21 In Stock
1 EA = BOX OF 100 CHARTS, 32 DAY, C
$54.20 / each
22 In Stock
1 EA = BOX OF 100 CHARTS, 1 DAY, F
$57.46 / each
16 In Stock
1 EA = BOX OF 100 CHARTS, 32 DAY, F
$54.20 / each
98 In Stock
120 CHARTS, 20 OF EACH STYLE
$54.47 / each
120 In Stock
1 EA = BOX OF 100 CHARTS, 7 DAY, C
$54.20 / each
102 In Stock
1 EA = BOX OF 100, 7 DAY, F
$54.20 / each
149 In Stock
32DAY-HOSPITALS C, 20/PK
$57.58 / each
0 In Stock
HOSPITALS F, 20/PK
$57.58 / each
0 In Stock
7DAY-HOSPITALS C, 20/PK
$57.58 / each
165 In Stock
HOSPITALS F, 20/PK
$57.58 / each
0 In Stock
LABS/CLEAN ROOMS F, 20/PK
$57.58 / each
62 In Stock
32DAY-LABS/CLEAN ROOM C, 20/PK
$57.58 / each
276 In Stock
7DAY-LABS/CLEAN ROOMS C, 20/PK
$57.58 / each
0 In Stock
LABS/CLEAN ROOMS F, 20/PK
$57.58 / each
9 In Stock
32DAY-MUSEUM/ART C, 20/PK
$57.58 / each
0 In Stock
MUSEUM/ART GALLERY F, 20/PK
$57.58 / each
0 In Stock
MUSEUM/ART GALLERY C, 20/PK
$57.58 / each
0 In Stock
COMPUTER ROOM/OFFICE F, 20/PK
$57.58 / each
0 In Stock
This item is discontinued. Please contact Technical Sales Team for assistance.
32DAY-COMPUTER ROOM C, 20/PK
$57.58 / each
60 In Stock
7DAY-COMPUTER ROOM C, 20/PK
$57.58 / each
0 In Stock
WINE STORAGE, DEG F, 20/PK
$57.58 / each
0 In Stock
Rated 5 out of 5 by from ED Awesome item and works as it should. Very happy with this purchase.
Date published: 2024-02-24
Rated 2 out of 5 by from Hit or Miss One works faultless and the other one constantly falls.
Date published: 2020-07-16
  • y_2026, m_8, d_7, h_9
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.48
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_CTXL-DPR-W-V, prod, sort_[SortEntry(order=HELPFULNESS, direction=DESCENDING), SortEntry(order=POSITIVE_FEEDBACK, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_omega
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getReviews, 5ms
  • REVIEWS, PRODUCT

The pen of the chart recorder CTXL TRH W is not starting on the initial line, it starts two degrees off line of the grid. It was already calibrated.  Thanks for your input. 

Asked by: Bertelib
Thank you for the inquiry. Please forward this question to TEMP@DWYEROMEGA.COM. Best regards OMEGA
Answered by: Norwalk AE_RS
Date published: 2024-10-20

Does this come with calibration certs?

Asked by: WillieH
Hi WillieH Thank you for the inquiry. NIST cert is optional. A certificate of conformance will be included with confirmation of order. Best regards OMEGA
Answered by: NorwalkAE
Date published: 2020-06-14

What is the warranty and life spam of this unit?

Asked by: Armando35
Hi Armando35 Thank you for the inquiry.Warranty is for 2 years. We do not have a published service life of this product. Best regards OMEGA
Answered by: AENwlk
Date published: 2020-07-21

We have a CTXL-TRH-W model but we have problems selecting the correct paper chart. We have the paper charts CT485-CWC and the CT485-CDF. The main problem is that both charts start the humidity scale in different points. Which one is correct?

Asked by: Kevin320185
Hi Kevin, Thank you for the inquiry. CWC chart is weekly rotation degrees C. CDF chart is daily rotation degrees F. When you select matching temperature units in the set up menu the RH values will also match the chart range values. Refer to quick start manual to select the matching temperature units of your chart paper. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2024-04-22

We are trying to record Humidity and Temperatures in a Primer Booth. The operations will produce combustible vapors under normal operating conditions. Do the Model CTXL-TRH-W meet electrical requirements for class 1 division 1. If not? Recommendations?

Asked by: Fernando adhesive primer
Hi Fernando, Thank you for the inquiry. The CTXL does not meet Class 1 requirement. We currently do not offer a similar rated product. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2022-03-29

Your manual states that temperature calibration is not necessary. How do I justify this in an audit? Also the humidity calibration is two point. Our requirement is a 3 point calibration is this possible?

Asked by: Mr Cook
Hi Mr Cook, Thank you for the inquiry. For temperature / RH certifications you can still verify accuracy at multiple points. If temperature reading is out of tolerance there is no adjustment. The RH adjustment is based on 2 points. Best regards OMEGA
Answered by: NorwalkAE_RS
Date published: 2022-03-18
  • y_2026, m_8, d_7, h_9CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.48
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_6
  • loc_en_US, sid_CTXL-DPR-W-V, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_omega
  • bvseo_sdk, java_sdk, bvseo-4.0.0
  • CLOUD, getContent, 7ms
  • QUESTIONS, PRODUCT
en-US
en
Save Configuration