Benchmark Scientific H3715 HS-10 Plus™ Multi-Functional Hotplate Stirrer — 5-Position, 10 × 10 in., 115V

Product Description

The Benchmark Scientific H3715 HS-10 Plus™ is a multi-functional hotplate stirrer designed to simultaneously heat and stir up to five sample vessels on a single large 10 × 10 inch white ceramic top plate — the only hotplate stirrer in its class that combines multi-position stirring capability with a full-size heating surface up to 400°C. Unlike traditional multi-position stirrers, the HS-10 model features a large (10 x 10 in.) square top plate that provides the flexibility to heat and stir larger sample vessels, up to ten inches in diameter (including 1 × 10L bottles). Digital speed and temperature control, a safety LED hot surface indicator, and optional external temperature probe compatibility make the H3715 the most versatile hotplate stirrer in the Benchmark lineup. 115V. Also available as H3715-E (230V).

Five Stirring Positions — Simultaneously Heat and Stir Up to 5 Vessels The Benchmark HS-10 Plus Hotplate Stirrer supports heating and stirring of up to five sample vessels, simultaneously. The five stirring positions are clearly marked on the plate surface to ease sample loading and ensure proper positioning of vessels over each stirring zone. This multi-position capability makes the H3715 an exceptional value for labs running multiple simultaneous reactions, dissolutions, buffer preparations, or any workflow requiring parallel stirring of several samples at the same temperature — replacing what would otherwise require multiple individual hotplate stirrers.

Large 10 × 10 Inch Ceramic Top Plate — Maximum Flexibility The top plate features a durable, chemically resistant, white-ceramic coating that provides exceptionally uniform heating for temperatures up to 400°C. The 10 × 10 inch square format is significantly larger than the standard 7 × 7 inch hotplate stirrer platform — providing the flexibility to accommodate a single large vessel up to ten inches in diameter (including a 10L bottle), or multiple smaller vessels simultaneously. The white ceramic coating resists chemical spills and is easy to clean, while providing the uniform heat distribution required for consistent, reproducible temperature control across all five stirring positions.

Exceptional Bottle Capacity — From 500mL to 10L The H3715 accommodates a remarkable range of vessel sizes across its five positions:

• 1 × 10L bottle — single large-vessel stirring at maximum capacity
• 2 × 2L bottles — dual large-vessel simultaneous stirring
• 4 × 1L bottles — four-position parallel stirring
• 5 × 500mL flasks or bottles — full five-position operation

This breadth of vessel compatibility, from 500mL flasks through a single 10L carboy, makes the H3715 equally useful for small-scale parallel reactions and large-scale single-vessel applications — a level of versatility not available on standard 7 × 7 inch hotplate stirrers.

35°C to 400°C Temperature Range — From Gentle Warming to High-Temperature Applications The H3715 heats from 35°C up to 400°C — covering the full range from gentle sample warming and standard laboratory incubation temperatures through high-temperature dissolution, boiling, and thermochemical reactions. The constant monitoring system provides precise control of temperature with rapid heating and faster boiling times. The advanced microprocessor continuously monitors and adjusts the heating element to maintain the set temperature with consistent accuracy throughout the run.

150 to 1,500 rpm Stirring Speed — From Gentle to Vigorous Mixing The H3715 delivers stirring speeds from 150 to 1,500 rpm — covering the full range from gentle, slow mixing of sensitive solutions through vigorous stirring of viscous samples and large-volume media. The powerful motor drive system ensures efficient mixing in larger and more viscous samples. The 15-liter total stirring capacity means the H3715 can maintain effective mixing even in the most demanding large-volume applications.

Digital Display — Speed and Temperature Always Visible Temperature and mixing speed can be viewed on the large digital display. Both set and actual values are continuously visible on the large digital readout — allowing operators to monitor performance at a glance without interrupting the run. Digital control eliminates the imprecision of analog dial-based hotplate stirrers, providing exact, repeatable speed and temperature settings for reproducible protocols.

Safety LED — Hot Surface Warning A safety LED illuminates when the top plate temperature exceeds 50°C. The safety LED provides a clear, visible warning that the ceramic surface is hot — protecting operators from accidental burns after runs are complete and the plate is cooling. This is a critical safety feature in shared lab environments where multiple users may approach the instrument without knowing its recent operating history.

Optional External Temperature Probe — Direct Sample Temperature Control An external temperature probe can be used for applications that require precise control of sample temperature. The probe provides direct feedback to the microprocessor with constant monitoring and adjustments for maintaining the selected sample temperature within ±1°C. The optional probe (H3770-TP, sold separately) allows the H3715 to control the actual temperature of the liquid in the vessel rather than the plate surface temperature — critical for applications where the difference between plate and sample temperature is significant, such as heating viscous solutions, large volumes, or samples in insulated vessels.

Optional Accessories:

• H3770-TP — External temperature probe for direct sample temperature control (±1°C accuracy)
• H3770-ROD — Support rod for holding the temperature probe in position
• H3770-CS — Clamp set for securing vessels on the plate
• H3770-CSTF — Clamp set, tall format

Available Configurations:

Key Features

• Multi-functional design — simultaneously heat and stir up to 5 vessels
• 5 clearly marked stirring positions
• Large 10 × 10 in. (25.4 × 25.4 cm) white ceramic top plate
• Temperature range: 35°C to 400°C
• Speed range: 150 to 1,500 rpm
• Maximum stir capacity: 15 liters
• Bottle capacity: 1 × 10L / 2 × 2L / 4 × 1L / 5 × 500mL
• Durable, chemically resistant white ceramic coating
• Exceptionally uniform heating across full plate surface
• Advanced microprocessor controls with constant temperature monitoring
• Large digital display — speed and temperature always visible
• Safety LED — illuminates when plate exceeds 50°C
• Optional external temperature probe compatibility (±1°C sample accuracy)
• Dimensions: 11.6 × 16.7 × 4.5 in. (29.5 × 42.4 × 11.4 cm)
• 115V, 50–60 Hz, 750W

Supported Applications Parallel multi-sample stirring and heating, buffer and media preparation, dissolution studies, chemical synthesis and reactions, boiling and reflux setups, large-volume solution preparation (up to 10L), viscous sample mixing, temperature-controlled reactions requiring external probe monitoring, microbiology and cell culture media preparation, and any laboratory application requiring simultaneous multi-position hotplate stirring on a large format surface.

Technical Specifications