Regardless of the size and number of standard resistors you have to maintain, Hart has a bath that will do the job for you. Choose one of the three models described here or call us for information on other sizes.
Like all Hart baths, these resistor baths have unbeatable stability and uniformity. No other baths limit long-term and short-term drift—as well as gradients—better than these baths. Hart’s proprietary controller senses temperature changes as small as 0.00001 °C. This controller is the industry’s best-selling temperature calibration controller for bath retrofits because it improves the stability of almost every other poorly performing bath. So why not buy the best to begin with?
Each bath can be delivered with any size resistor rack you want (a standard model is included with each bath), and the Model 7015 has several other special features that make your work easier.
The 7015 has a 95-liter tank and a temperature range of 0 °C to 50 °C. It’s stable to ±0.0007 °C.
It has a one-piece stainless steel lid designed to drain spills and splashes back into the bath as you remove resistors. It has a large access opening to make handling large resistors, like the Thomas design standard resistors, easier. The tank has an electrically isolated resistor shelf.
This is truly a quality resistor bath, and it’s backed by Hart’s industry-leading service.
This is a large bath with a tank 27½ inches long by 22 inches wide. It has a temperature range of 0 °C to 50 °C and a stability of ±0.0007 °C.
For a bath this size and with these specs, it is priced extremely well. The Model 7009’s large tank can handle many resistors of any size.
This is the quietest resistor bath you’ve ever heard. The 7108 uses thermoelectric (Peltier) modules to provide heating and cooling over its range from 20 °C to 30 °C. Without a compressor, noise is dramatically reduced. Power requirements are also lower, so you save money running the bath and add less heat load to your lab.
With a 51-liter (13.2-gal) tank, the 7108 holds plenty of resistors. A large 14" x 14" (356 x 356 mm) access opening allows you to easily move resistors in and out of the bath. A resistor rack comes with each unit that fits across the bottom of the tank. Made from hard-anodized perforated aluminum, this rack maintains the necessary electrical isolation between your resistors.
Hart sells a complete selection of fluids for your bath. You can find these here.
0 °C to 50 °C†
0 °C to 50 °C†
20 °C to 30 °C
Stability at 25 °C
±0.0007 °C (water)
±0.002 °C (water)
±0.003 °C at 25 °C (water)
±0.005 °C (water)
Digital display with push-button data entry
0.002 °C; high-resolution mode, 0.00003 °C
Digital Setting Accuracy
Digital Setting Repeatability
500 and 1000 Watts
100 to 200 Watts
100 W in ambient 23 °C
699 x 279 mm (27.5 x 11 in)
699 x 559 mm (27.5 x 22 in)
356 x 356 mm (14 x 14 in)
Bath Chamber Dimensions (HxWxD) (unobstructed space)
699 x 279 x 330 mm
669 x 559 x 330 mm
356 x 203 x 355 mm
330 mm (13 in)
203 mm (8 in)
304 stainless steel
Tank: 304 stainless steel
Factory-set high temperature
115 VAC (±10 %), 60 Hz, 15 A or 230 VAC, 50 or 60 Hz, 8 A, specify
230 VAC (±10 %), 50 or 60 Hz, 12 A
115 VAC (±10 %), 50/60 Hz, 3 A or 230 VAC (±10 %), 50/60 Hz, 1.6 A, specify
95 liters (25 gallons)
167 liters (44 gallons)
51 liters (13.2 gallons)
141 kg (310 lb.)
150 kg (330 lb.)
35 kg (75 lb.)
1219 x 1118 x 559 mm
1092 x 1130 x 864 mm
489 x 413 x 559 mm
Interface-it software and RS-232 computer interface are available for setting the bath temperature via an external computer. (Both come standard with a 7108.) For IEEE-488, add the 2001-IEEE to the automation package.
|†Although the 7015 and 7009 baths are capable of reaching higher temperatures, they are designed for use with standard resistors. Therefore, the soft cutout of the instrument has been set at the factory to 50 °C to protect standard resistors placed in the bath.|