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Hart Scientific 7341 Deep-Well Compact Baths

Hart Scientific 7341-16
         
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BATH, DEEP-WELL COMPACT, -40 TO 150C

Features

  • 18" of depth with just 4.2 gallons of fluid
  • Perfect for liquid-in-glass thermometer calibrations with optional LIG kit
  • Fast, quiet, compact (yet deep!), and economical
  • We ship Hart Scientific products only within the United States and United States territories. This DOES include US military working abroad. If you have any questions about this policy please call - 1-877-742-8378.
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Product Information

Need a bath with a lot of immersion depth, great stability, and a low price tag? How about one that minimizes fluid costs, changes temperatures quickly, and runs quietly? (Did we mention these new baths look fantastic?)

Hart’s new Deep-Well Compact Bath series features four models covering temperatures from –80°C to 300°C.

Each model includes an 18-inch (457 mm) deep tank to accommodate long-stem PRTs, SPRTs, and liquid-in-glass (LIG) thermometers. Access openings are 4.7" by 6.8" (120 by 172 mm) so you can calibrate many thermometers simultaneously. Yet only 4.2 gallons (15.9 liters) of fluid are needed to get all the benefits Deep-Well Compact Baths offer.

Using Hart’s own best-in-class temperature controller, these baths deliver the performance you need for confidence in your calibrations. The Model 7381 (–80°C to 110°C) features both stability and uniformity better than ±0.007°C over its entire range. The Models 7341 and 7321 (–40°C to 150°C and –20°C to 150°C, respectively) are stable to ±0.005°C and uniform to ±0.007°C at temperatures below ambient. And the Model 6331 provides stability and uniformity from ±0.007°C to ±0.025°C over its range from 40°C to 300°C.

Be sure to understand the performance of the temperature calibration equipment you buy. Some manufacturers offer only limited (and often difficult to interpret) specifications. The table at right includes stability and uniformity values for the entire range of each bath—and tells you what fluid we used in the measurements. If that’s still not enough, give us a call and we’ll be happy to explain anything—and share data with you.

Hart’s control system automatically adds refrigeration when you need to cool down quickly, and shuts down refrigeration when you need to heat up quickly. For maximum stability, refrigeration levels are automatically balanced to match the set-point temperature you’re working at.

Bath LIG and Scope The 2019-DCB Liquid-in-Glass Thermometer Calibration Kit includes a carousel that holds up to 10 thermometers and an adapter tube that raises the fluid level to within 5–15 mm of the thermometers' readings. The 2069 Magnifier Scope mounts easily to the front of any Deep-Well Compact Bath to provide magnification of 8X or greater.

Connect any of these baths to a Hart thermometer readout and Hart’s industry-leading MET/TEMP II temperature calibration software, and you’ll be performing automated probe calibrations within minutes from switch-on.

Want to optimize your bath for calibrating liquid-in-glass thermometers? Simple. With the optional LIG Thermometer Calibration Kit, you get an easy-to-install fluid level adapter tube that raises the meniscus of the bath fluid to within about 0.5" of the top surface of the bath itself. The kit also includes a thermometer carousel that fits onto the top of the fluid level adapter tube and holds up to ten LIG thermometers in place. A magnifying scope (8X) is also available that mounts to the front of any Deep-Well Compact Bath so you can clearly see the liquid level of your thermometer against its temperature scale.

Like all Hart baths, these units come with a report of test that includes one hour of stability data and a verification of set-point accuracy. A convenient overflow reservoir captures any excess fluid resulting from fluid expansion, allowing the trapped fluid to be reused following subsequent fluid contraction. A drain is also provided for easily emptying the bath’s tank when needed.

 

The 2019-DCB Liquid-in-Glass Thermometer Calibration Kit includes a carousel that holds up to 10 thermometers and an adapter tube that raises the fluid level to within 5–15 mm of the thermometers' readings. The 2069 Magnifier Scope mounts easily to the front of any Deep-Well Compact Bath to provide magnification of 8X or greater.

Specifications

  6331 7321 7341 7381
Range 40°C to 300°C –20°C to 150°C –40°C to 150°C –80°C to 110°C
Stability ±0.007°C at 100°C (oil 5012)
±0.010°C at 200°C (oil 5017)
±0.015°C at 300°C (oil 5017)
±0.005°C at –20°C (ethanol)
±0.005°C at 25°C (water)
±0.007°C at 150°C (oil 5012)
±0.005°C at –40°C (ethanol)
±0.005°C at 25°C (water)
±0.007°C at 150°C (oil 5012)
±0.006°C at –80°C (ethanol)
±0.005°C at 0°C (ethanol)
±0.005°C at 100°C (oil 5012)
Uniformity ±0.007°C at 100°C (oil 5012)
±0.017°C at 200°C (oil 5017)
±0.025°C at 300°C (oil 5017)
±0.007°C at –20°C (ethanol)
±0.007°C at 25°C (water)
±0.010°C at 150°C (oil 5012)
±0.007°C at –40°C (ethanol)
±0.007°C at 25°C (water)
±0.010°C at 150°C (oil 5012)
±0.007°C at –80°C (ethanol)
±0.007°C at 0°C (ethanol)
±0.007°C at 100°C (oil 5012)
Heating Time† 140 minutes, from 35°C to 300°C
(oil 5017)
120 minutes, from 25°C to 150°C
(oil 5012 @ 115 V)
120 minutes, from 25°C to 150°C
(oil 5012 @ 115 V)
60 minutes, from 25°C to 100°C
(oil 5012 @ 230 V)
Cooling Time† 900 minutes (14 hrs.), from 300°C to 100°C
(oil 5017)
110 minutes, from 25°C to –20°C (ethanol) 120 minutes, from 25°C to –40°C (ethanol) <6 hours, from 25°C to –80°C
(ethanol)
Stabilization Time 15–20 minutes
Temperature Setting Digital display with push-button data entry
Set-Point Resolution 0.01°; 0.00018° in high-resolution mode
Display Resolution 0.01°
Digital Setting Accuracy ±1°C
Digital Setting Repeatability ±0.01°C
Access Opening 4.7" x 6.8" (120 x 172 mm)
Depth 18" (457 mm) without Liquid-in-Glass Thermometer Cal Kit
19" (482 mm) with Liquid-in-Glass Thermometer Cal Kit
Wetted Parts 304 stainless steel
Power† 115 VAC (±10%), 50/60 Hz, 14.8 A or 230 VAC (±10%), 50/60 Hz, 7.4 A, 1860 W, specify 115 VAC (±10%), 60 Hz, 14 A or 230 VAC (±10%), 50 Hz, 7 A, 1350 VA, specify 115 VAC (±10%), 60 Hz, 16 A or 230 VAC (±10%), 50 Hz, 8 A, 1450 VA, specify 230 VAC (±10%), 50 or 60 Hz, specify, 10 A, 2430 VA
Volume 4.2 gal (15.9 liters)
Size 14" W x 31" D x 42" H (37" from floor to tank access opening)
(356 x 788 x 1067 mm) (940 mm from floor to tank access opening)
Weight 90 lb. (41 kg) 137 lb. (62 kg) 150 lb. (68 kg) 200 lb. (91 kg)
Automation Package Interface-it software and RS-232 included (IEEE-488 optional)
†Rated at nominal 115 V (or optional 230 V)

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