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Fisherbrand™ Isotemp™ Heated Immersion Circulators: Model 4100B Available on GSA/VA Contract for Federal Government customers only.

Convenient, simple way to convert open baths to constant temperature baths.

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Catalog No. 13-874-438

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Includes: External circulation plumbing fittings



Precision, features and performance enables optimization of configurations to meet various application needs.

Each unit features:

  • Two pump speeds: 50% and 100%
  • Adjustable PID control
  • Large, easy-to-read, five-line LCD display
  • Three languages: English, German, French
  • Over temperature/low level cutouts with audible and visual alarms
  • High quality industrial motor for excellent pump performance and long life

4100 Controller
for routine temperature control

  • Ambient to +100°C
  • 1 kW heater
  • Powerful force pump
  • Five programmable set points: +20°C, +37°C, +50°C, +70°C and +100°C
  • Temperature display in °C, °F or °K with resolution of 0.1 or 0.01
  • Model 4100B comes with a Bridge
  • Compatible fluids: DI water up to 3 mOhm; 50/50 EG/Water; 50/50 PG/Water


This product(s) resides on a Fisher Scientific GSA or VA contract. If you are viewing this page as a nonregistered user, the price(s) displayed is List Price. To view your GSA or VA contract pricing, log in using your account number, or become a registered user by contacting one of our Customer Service teams. You can also view your contract price by searching for this item(s) on GSA Advantage. To place an order, contact Fisher Scientific Customer Service.


UL/CSA (compliance pending), CE certified, RoHS/WEEE


Safety Class III, FL-DIN 12876

Warranty and Services




115 V 60 Hz
7.5 in.
60 Hz
19 cm
310 mbar
Isotemp™ Immersion Circulator
3.8 kg
115 V
CE, Safety Class II
Ambient +10° to 100°C
32 cm
12.6 in.
8.5 lb.
4.4 in.
11.1 cm
Product Certifications
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