Watlow’s family of microprocessor based temperature and limit controllers provide an economical solution for applications requiring simple on-off control. These controllers and limits are available in a broad range of packaging options, allowing users to select the best version for their individual application. The controllers and limits are available with or without an operator interface and can be ordered in square 1/8 DIN panel mount, DIN rail mount or open board design configurations. The SERIES CV includes an operator interface for viewing and selecting the set point. A red, four-character seven segment LED displays the set point with a push to show process option. The set point selection is made with a continuous turn rotary encoder or optional tactile keys interface.



Current lead time is 5-7 Days, FOB: Winona, MN.

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All Variations

Part No.DescriptionPriceQuantityAdd to Cart
CVB1HH00321000DCV On-Off Control$201.00
CVB1HH00321900DCV On-Off Control$201.00
CVB1KH00321000DCV On-Off Control$201.00
CVB1KH00322500DCV On-Off Control$201.00
CVB2HH00321000DCV On-Off Control$219.00
CVB2HH00321900DCV On-Off Control$219.00
CVB2KH00321000DCV On-Off Control$219.00
CVB2KH00322500DCV On-Off Control$219.00
CVBCHH00321000DCV On-Off Control$226.00
CVBCHH00321900DCV On-Off Control$226.00
CVBCKH00321000DCV On-Off Control$226.00
CVBCKH00322500DCV On-Off Control$226.00
CVC1HH00321000DCV On-Off Control$243.00
CVC1HH00321900DCV On-Off Control$243.00
CVC1KH00321000DCV On-Off Control$243.00
CVC1KH00322500DCV On-Off Control$243.00
CVC2HH00321000DCV On-Off Control$261.00
CVC2HH00321900DCV On-Off Control$261.00
CVC2KH00321000DCV On-Off Control$261.00
CVC2KH00322500DCV On-Off Control$261.00
CVCCHH00321000DCV On-Off Control$268.00
CVCCHH00321900DCV On-Off Control$268.00
CVCCKH00321000DCV On-Off Control$268.00
CVCCKH00322500DCV On-Off Control$268.00
CVE1HH00321000DCV On-Off Control$243.00
CVE1HH00321900DCV On-Off Control$243.00
CVE1KH00321000DCV On-Off Control$243.00
CVE1KH00322500DCV On-Off Control$243.00
CVE2HH00321000DCV On-Off Control$261.00
CVE2HH00321900DCV On-Off Control$261.00
CVE2KH00321000DCV On-Off Control$261.00
CVE2KH00322500DCV On-Off Control$261.00
CVECHH00321000DCV On-Off Control$268.00
CVECHH00321900DCV On-Off Control$268.00
CVECKH00321000DCV On-Off Control$268.00
CVECKH00322500DCV On-Off Control$268.00


  • Fixed or adjustable set points – Provide tamper-proof operation & offer control flexibility
  • Four character LED display – Improves set point selection accuracy
  • Multiple mounting options – Minimize installation time
  • Heat or cool operation – Provides application flexibility
  • High or low limit with auto or manual reset – Provides application flexibility
  • Fahrenheit or celsius operation with indication – Offers application flexibility
  • Sensor break protection – Provides positive system shutdown
  • Agency approvals – Meet certification requirements/compliance
  • Microprocessor based technology – Ensures accurate repeatable control


C V __ __ __ __ __ __ __ __ __ __ __ __ __
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
1-2. Control Model
CV = Series CV – On-Off controller, rotary set point adjustment with tactile key order option, four character seven segment display, 1/8 DIN square package.
3. Power Supply & Output 
B = 120V~(ac), switched dc output
C = 120V~(ac), eight amp relay output
D = 230-240V~(ac), switched dc output
E = 230-240V~(ac), eight amp relay output
F = 24V~(ac), switched dc output
G = 24V~(ac), eight amp relay output
4. Package 
1 = Panel mount, 1/8 DIN square – spade terminals
2 = DIN-rail mount – spade terminals
5 = Panel mount, 1/8 DIN square – screw terminals
6 = DIN-rail mount – screw terminals
A = NEMA 4X Panel mount, tactile keys – spade terminals
B = DIN-rail mount, tactile keys – spade terminals
C = NEMA 4X Panel mount, tactile keys – screw terminals
D = DIN-rail mount, tactile keys – screw terminals
5. Sensor Type and Scale 
H = T/C Type J Fahrenheit (-346 to 1900°F)
J = T/C Type J Celsius (-210 to 1038°C)
K = T/C Type K Fahrenheit (-454 to 2500°F)
L = T/C Type K Celsius (-270 to 1370°C)
M = T/C Type T Fahrenheit (-454 to 750°F)
N = T/C Type T Celsius (-270 to 400°C)
P = RTD Fahrenheit (-328 to 1472°F)
R = RTD Celsius (-200 to 800°C)
S = T/C Type E Fahrenheit (-328 to 1470°F)
T = T/C Type E Celsius (-200 to 800°C)
6. Control Type 
H = Heat
C = Cool
7-10. Low Set Point Operating Temperature Range Value (enter low set point value in 4 digits, i.e. 0450 or 1370)
A minus sign (-) is used in the left most digit to indicate a negative temperature value i.e. -450.
11-14. High Set Point Operating Temperature Range Value (enter high set point value in 4 digits, i.e. 0450 or 1370)
A minus sign (-) is used in the left most digit to indicate a negative temperature value i.e. -450.
15. Overlay/Custom Options 
A = Standard, show set point only with Watlow logo
B = Push to show process with Watlow logo
C = Push to adjust set point with Watlow logo
D = Show process push to adjust set point with Watlow logo
1 = Standard without Watlow logo
2 = Push to show process without Watlow logo
3 = Push to adjust set point without Watlow logo
4 = Show process push to adjust set point without Watlow logo

CVB1HH00321000D | CVB1HH00321900D | CVB1KH00321000D | CVB1KH00322500D | CVB2HH00321000D | CVB2HH00321900D | CVB2KH00321000D | CVB2KH00322500D | CVBCHH00321000D | CVBCHH00321900D | CVBCKH00321000D | CVBCKH00322500D | CVC1HH00321000D | CVC1HH00321900D | CVC1KH00321000D | CVC1KH00322500D | CVC2HH00321000D | CVC2HH00321900D | CVC2KH00321000D | CVC2KH00322500D | CVCCHH00321000D | CVCCHH00321900D | CVCCKH00321000D | CVCCKH00322500D | CVE1HH00321000D | CVE1HH00321900D | CVE1KH00321000D | CVE1KH00322500D | CVE2HH00321000D | CVE2HH00321900D | CVE2KH00321000D | CVE2KH00322500D | CVECHH00321000D | CVECHH00321900D | CVECKH00321000D | CVECKH00322500D

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Watlow CV On-Off Control
$201.00$268.00Select options