Cole-Parmer Masterflex L/S Variable-speed Drive with 10-turn Speed Control and Remote Capabilities, 1 to 100 rpm, 115 VAC. Model 77521-50

The Cole-Parmer Masterflex L/S Variable-speed Drive with 10-turn Speed Control and Remote Capabilities, 1 to 100 rpm, 115 VAC. Model 77521-50 is engineered for reliability and ease of use—ideal for integration into lab or process applications requiring precise flow control. Remote speed control requires DB9 male connector 07595-45. Use connector 07595-45 also for remote control of start/stop via contact closure or open collector (5 V TTL). 

• Easy-to-use analog drives offer precise speed control and remote control capability—ideal for metering, feed, and transfer applications.
• 10-turn potentiometer for precise, accurate speed control. Locking lever enables you to lock in your exact speed setting.
• Separate speed control and on/off/reverse switch with inertia center and green LED power indicator. Maintain speed setting while turning pump on/off.
• Remote control capabilities via DB9 female connector on back of drive—speed control input: 4 to 20 mA, or 2 to 10 VDC; start/stop via open collector or contact closure.
• Reversible motor—purge tubing before or after pumping; pump fluid in either direction.
• The 1/10-hp reversible motor has soft start and back EMF for ±2% speed control. Promotes smooth operation and long service life.
• Stackable ABS plastic housing is IP23 rated for splash resistance and easy wipedown.

Specifications:

• Max flow rate (mL/min): 580
• Min flow rate (mL/min): 0.06
• Control type: Variable speed
• Power (Amps): 1.5
• Motor (hp): 1/10
• Motor (watts): 75
• Reversible motor: Yes
• Rpm: 1 to 100
• IP rating (Drive): IP23
• Dimensions (Drive): 11.5"L x 7"W x 7"H (29.2 x 17.8 x 17.8 cm)
• Speed control: ±2% (10-turn speed control)
• No. of Pump heads accepted: 4
• Type of Pump heads accepted: Standard, Easy-Load, Easy-Load II, Quick Load, High Performance, Cartridge, Multichannel, PTFE Tubing, PTFE Diaphragm