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Limits and Alarms
Limits and Alarms Temperature ControllersSingle-loop

Watlow limit controllers provide agency approved performance in safety limit applications, including UL®

CSA, A.G.A. and FM (on some models). All are available with industry standard I/O options. All Watlow limit/alarm controllers are designed and manufactured to withstand harsh industrial environments, and come with a three-year warranty for Control Confidence®.

Controller DIN Size Accuracy Operating Environment
SERIES LV Open board, DIN Rail or 1/8 DIN square ±1.00% 0 to 70°C (32 to 158ºF)
SERIES LF Open board, DIN Rail or 1/8 DIN square ±1.00% 0 to 70°C (32 to 158ºF)
SERIES SD_L 1/32 to 1/4 DIN ±0.10% -18 to 65°C (0 to 149ºF)
SERIES SD6L_D 1/16 DIN Panel ±0.10% -18 to 65°C (0 to 150ºF)
SERIES 97 1/16 DIN ±0.10% 0 to 65°C (32 to 149ºF)
Applications
  • Laboratory equipment
  • Environmental chambers
  • Furnace and ovens
  • Industrial machinery
  • Plastics processing
  • Semiconductor
  • Boiler
  • Food preparation
  • packaging

4- to 48-Loop Temperature ControllersMulti-loop

The Watlow multi-loop limits and alarms are a low-cost solution for multi-channel, redundant temperature monitoring. These limits and alarms can continuously monitor thermocouples, RTDs or thermal switches, making them ideal for multi-zone applications.

Controller DIN Size Accuracy Operating Environment
TLM-8 Thermal Limit Panel or DIN-Rail mountable 0.07% at 25°C  
CAS 200 Alarm Scanner 1/8 0.07% at 25°C  

Applications
  • Nayprocess requiring multi-channel redunant temperature monitoring
  • Semiconductor capital equipment requiring SEMI S2-93
  • Electronics packaging equipment
  • Plastics injection molding and extrusion equipment
UL® is a registered trademark of Underwriter’s Laboratories, Inc.

Product Information

Click on the below links for more product information. PDF documents require Adobe® Reader® version 7 or higher for viewing.

 Specification Sheets & Brochures Size/Pages
 Basic Temperature and Limit Controllers 110K / 4  (PDF)
 CAS200 Scanner 1,112K / 4  (PDF)
 EHG SL10 Process Controller and Safety Limit 783K / 4  (PDF)
 EM Gateway 124K / 2  (PDF)
 Plastics Processing 3,654K / 16  (PDF)
 SERIES 94 110K / 2  (PDF)
 SERIES 97 117K / 4  (PDF)
 SERIES SD - Series SD Controller Family 344K / 4  (PDF)
 SERIES SD6_D - Series SD 1/16 Din PID Controller with DeviceNet Communications 89K / 2  (PDF)
 TLM-8 Thermal Limit Monitor 91K / 2  (PDF)
 WATCONNECT Software 69K / 1  (PDF)
 WATVIEW HMI Software 225K / 2  (PDF)
 Related News Releases and Newsletters Date
 Watlow's SERIES SD PID Temperature Controllers Now Feature TRU-TUNE+™ ... 10-11-06
 SERIES SD from Watlow Provides Affordable, Accurate Temperature Control 03-08-04
 Economical Temperature and Limit Controllers Designed for Simple On-Off ... 08-28-03
 Watlow to Introduce New Heating, Sensing and Control Products at NPE 2003 03-17-03
 Watlow to Introduce New SD SERIES Controllers at Interplas 2002 09-11-02
 Watlow Offers Protection for Over-Temperature Hazards with NEMA 4X Rating 09-01-97
 Watlow Offers an Over-Temperature Limit Controller that can be Customized ... 08-01-97
 Watlow Offers Multi-Channel Thermal Limit Monitor, Ideal For Multi-Zone ... 06-02-97
 Compact Alarm Scanner (CAS200) from Watlow Anafaze for Low Cost Alarm ... 06-02-97
 Product Technical Information Size/Pages
 CAS200 User's Guide, Rev 3.0, July 2001 1,191K / 124 (PDF)
 CLS200, MLS300 and CAS200 Communications Specification, Rev 3.0, November 2003 656K / 92 (PDF)
 EM Gateway User's Manual 0600-0040-0001 Rev D 671K / 28 (PDF)
 EZ-ZONE ST Integrated Control Loop User Manual Rev.D October 2006 7,221K / 86 (PDF)
 Engineering Bulletin Over/Undertemperature Protection, Rev D, September 2003 81K / 2 (PDF)
 Modbus RTU Example in Visual Basic 6.0 (.zip file) 23K / 0 
 SDAC User's Guide Rev 4.0 December 2004 237K / 4 (PDF)
 SERIES 146 Retrofit Guide 402K / 118 (PDF)
 SERIES 92 Retrofit Guide and User's Manual 315K / 63 (PDF)
 SERIES 92 User's Manual, DIN Rail Mount Limit or Temp Control, Rev B, March 1998 217K / 13 (PDF)
 SERIES 94 User's Manual, 1/16 DIN Limit Controller, Rev C June 2002 620K / 40 (PDF)
 SERIES 96/97 Instruction Sheet, Field-Expandable Output Modules, Rev A, September ... 104K / 1 (PDF)
 SERIES SD Family Calibration Manual, Rev A, August 2003, 0600-0041-0030 156K / 8 (PDF)
 SERIES SD Limit EDS File (SD6L-XJXA-DNXX), Rev 2.1 26K / 1 
 SERIES SD Limit EDS File (SD6L-XJXA-DSXX), Rev 2.1 26K / 6 
 SERIES SD Limit, Rev. B, November 2004 1,026K / 60 (PDF)
 Series 97 User Manual Rev E July 2005 1,085K / 88 (PDF)
 Series L Temperature Limit - Rev. F November 2006 1,016K / 20 (PDF)
 Series SD6 Limit With Devicenet Rev B May 2005 108K / 21 (PDF)
 TLM-8 and TLM-8P User's Guide, Rev 3.0 November 2004 594K / 8 (PDF)
 Temperature Control, Educational Series Book 5 4,639K / 32 (PDF)
 WATVIEW User Manual rev B; June 2004 3,750K / 36 (PDF)
Adobe® is a registered trademark of Adobe Systems Incorporated.
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