Soil-Field
Shop all Soil-Field

Augers & Auger Sets
CBR Field Test
Compaction — Density
Electrical Density Gauge
Nuclear Gauges
Nuclear Gauge Accessories
Sand Cone
Voluvessel
Density Drive Sampler
Compaction — Stiffness
Earth Drill, Powered
Field Charts
Hydraulic Conductivity and Infiltration
Penetrometers
Penetrometer, Dual-Mass
Penetrometer, Dynamic Cone
Penetrometer, Pocket
Penetrometer, Proctor
Penetrometer, Proving Ring
Penetrometer, Static Cone
Plate Load Test
Probe Rods
Resistivity
Shear Vane, Torvane
Soil Moisture Tester
Soil Sampling
Shelby Tubes
Samplers
Sample Bags
Shovels
Water Evaluations
Aggregate
Shop all Aggregate

Abrasion, Durability
Classification
Moisture Test Equipment
Rock Testing
Sample Splitters
Sample Splitters, Riffle-Type
Universal Splitters
California Splitter
16-1 Sample Reducer
Microsplitters
Quartering Canvas
Shakers, Screen
Shakers
Screen Trays and Cloths
Shaker Accessories
Shakers, Sieve
Sieves, ASTM Test
8" Diameter Sieves
12" Diameter Sieves
4" & 12" Diameter Deep Frame Sieves
3", 5", 6" & 10" Diameter Sieves
Sieve Discount Specials
Sieves, 18" Riddle
Sieves, Mikro Air Jet
Sieves, Rocker-Type
Sieves, Soil Analysis
Sieves, Wet Washing
Sieves, Wet Washing-Cement
Sieve, Brushes & Accessories
Specific Gravity
Bench Setups
Containers, Baskets
Flasks and Bottles
Other Test Methods
Weigh-Below Scales for Specific Gravity
Washers, Aggregate
Aggregate Washers
Wet/Dry Sieve Shaker
Wet Washing Apparatus
Soil-Lab
Shop all Soil-Lab

Atterberg Limits
Liquid Limit Testing Tools
Plastic Limit Testing Tools
Shrinkage Limit Testing Tools
Calcium Carbonate Content
CBR Load Frames
Color
Consolidometers, Expansion Index Testing
Hydrometer Analysis of Soil
Moisture Content of Soil
Permeability of Soil
Automated Pressure Controllers
FlexPanels
Permeability Cells
Permeability Cap & Base Sets
Permeameters
pH
pH Meters
Buffer Solutions
Pin Hole Dispersion
Relative Density of Soil
Soil Compaction Tests
Compactors
CBR Molds & Accessories
Proctor Molds
Compaction, Vibratory
Compaction, Harvard
Soil Sample Ejectors
Sand Equivalent Test
Sample Preparation
Unconfined Soil Tester
Volume Change of Soil
Soil Mechanics
Shop all Soil Mechanics

Soil Consolidation Testing
Consolidation Testing Machines
Consolidation Testing Cells
Consolidation Cell Parts
Consolidation Testing Weights
Consolidation Testing Software
Consolidation Testing Sample Prep
Direct Shear Testing Equipment
Direct Shear Testing Machines
Direct Shear Shearboxes
Direct Shear Weights
Direct Shear Sample Prep
NEXT Direct Shear Software
Triaxial Testing Equipment
Triaxial Pressure Controllers
Pressure Controller Accessories
Triaxial Load Frames
Triaxial Load Frame Accessories
Triaxial Cells
Triaxial Cell Accessories
Triaxial Sample Prep
NEXT Software
Data Loggers
Load Cells & Transducers
Pore Pressure
Load Rings and Indicators
Load Rings
Digital Indicators
Dial Gauges
Contact Extensions
Indicator Mounts
Cables
Soil Erosion Testing
Concrete
Shop all Concrete

Air Meters and Indicators
Bond Strength and Anchor Testing
Compression Testing Machines
Compression Machines
Compression Machine Controllers
Accessories
Concrete Moisture Testing
Consistency
Ball Penetration Test
Roller-Compacted Test
Vebe Consistometer
Corrosion
Crack Monitors
Cube Testing
Curing
Curing Rooms
Curing Boxes
Curing Tanks
Cylinder Testing
Capping
Compaction
End Grinders
Masonry Saws
Measurement
Cylinder Molds
Mold Strippers
Pad Caps
Transport
Tamping Rods
Flexural Beam Testing
Test Apparatus
Flexural Compression Machines
Beam Molds
Freeze-Thaw
Ground Penetrating Radar
Maturity
Mixers - Concrete
Rebar Locators
Resistivity
Self-Consolidating Concrete
Set Time
Slump Testing
Slump Testing Sets
Slump Cones
Slump Testing Accessories
K Slump Testing
Strength Testing
Rebound Hammers
Windsor Probe
Windsor Pins
Super Air Meter
Ultrasonic Testing
Unit Weight
Measures
Strike-Off Plates
Scales
Water Impermeability
Cement
Shop all Cement

Air Entrainment – Mortar
Alkali Reactivity
Blaine Air, Fineness
Bleeding Rate
Bond Strength
Calorimeter
Cement Autoclave
Compression Strength
Cube Testing
Cube Molds
Sample Prep
Expansion Testing
Final Set Time, Gillmore
Fireproof Mat Gauge
Flow of Cement Mortar
Grout Flow
Grout Volume Change
Humidity, Curing Cabinets
Mortar Mixers
Mud Flow & Density
Organic Impurities
Portland Cement Reference Material
Prism Testing
Samplers, Bulk Cement
Test Sands
Ultrasonic Measuring
Vicat Apparatus Test
Vicat Testing Apparatus, Automated
Vicat Testers, Manual
Needles for Vicat
Plungers for Vicat
Weights for Vicat
Vicat Accessories
Water Retention of Cement
Asphalt
Shop all Asphalt

Asphalt Binder Testing
Bending Beam Rheometer (BBR)
Distillation
Ductility
Flash Point
Penetration
Pressure Aging Vessels
Ovens
Rice Test
RTFO
Softening Point Test
VDO
Viscosity
Dynamic Shear Rheometer
Asphalt Analysis
Binder Extraction, NCAT Oven
Solvent Extraction
Asphalt Solvent Recycling
Asphalt Mix Design
Balanced Mix Design
New Technology for Balanced Mix Design
Marshall Mix Design
Superpave Gyratory Compactors
Compaction Steel Roller
Load Frames for Asphalt Testing
Load Frame Accessories
Water Baths for Asphalt
Asphalt Mix Sample Splitter
Dynamic Testing
Universal Testing Machines
Four-Point Bending
Road Quality Testing
Three-Wheel Polishing Device
Nuclear Gauges
Texas Overlay
Hamburg (Immersion) Wheel Trackers
Asphalt Permeameters
Benkelman Beam
Core Drilling Machines
Core Drill Bits
Core Removal
Asphalt Pavement Scanner System
High-Low Detector
Skid Resistance, Polishing
Macrotexture Depth Test
Laboratory
Shop all Laboratory

Balances and Scales
200 to 700g Capacity
700 to 1,700g Capacity
1700 to 3800g Capacity
3800 to 9000g Capacity
9,000 - 40,000g Capacity
20lb to 140lb Capacity
140lb to 700lb Capacity
Mechanical Balances
Suspension Scales
Calibration Weights
Beaker Heating Supports
Triangles
Wire Gauze
Brushes
Calipers
Cork & Glass Cutters
Dishes, Jars, Boxes
Evaporating Dishes
Moisture Boxes
Durometers
Furnaces
Gauges and Indicators
Gloves
Hot Plates
Lab Burners
Bunsen Burners
Tirrill and High Temperature Burners
Specialty Burners
Flame Test Burners
Burner Accessories
Lab Clamps
Table Clamps
Rod "Muff" Clamps
Specialty Clamps
Burette Clamps
Screw Compressor Clamps
Clamps (Wire)
Adjustable Band Clamps
Lab Filter Pumps
Lab Tongs
Lab Tools
Lab Tripods & Stands
Tripods
Support Stands
Support Rings
Labware
Beakers
Dessicators
Dispensers
Flasks
Graduated Cylinders
Mallets, Rubber
Mortar & Pestle
Lab Ovens
Pans and Bowls
Crucibles
Material Scoops
Measures
Pans
Rock Picks & Chisels
Sample Containers
Sample Cans
Spatulas and Scoops
Straight Edges
Thermometers
Digital Hand-Held Thermometers
Digital, IR Thermometers
Digital Thermometer, Thermocouples
Min/Max / Alarm Thermometers
Digital, Stem Thermometers
Dual-Scale, Dial Thermometers
Mercury Thermometers, ASTM
Mercury-Free Thermometers
Mercury, General Purpose
Pocket-Type, Dial Thermometers
Pocket-Type, Stick Thermometers
Oven Thermometers
Surface Thermometers
Timers
Transformers
Trowels
Rain Gauge
New Products

Can't find what you're looking for?

Call us at 1.800.544.7220 or use Ask Humboldt

Description
Products

Guardian 3000, 7"x7" Ceramic Hotplate/Stirrers

Guardian 3000, 7"x7" Ceramic Hotplate/Stirrers

Affordable Digital Hotplate Stirrers Designed for Safety, Powerful Stirring and Rapid Heating
OHAUS Guardian 3000™ Hotplate Stirrers are designed for economical heating and stirring in all laboratory settings. The bright LCD display includes easy-to-read temperature and speed settings, intuitive icons and a prominent hot top indicator that lights up when the heater is above 40°C. Available in 7" x 7" heating surface. Models can be used with the optional temperature probe for precise temperature control of the sample.

Industry-leading safety at affordable prices. Guardian 3000 units offer safety, controlled heating and powerful stirring for general laboratory use – all at a competitive price point.
SafetyHeat™ protects the lab. An industry-leading early detection system uses two independent safety controls to monitor electronics and stop heating before overheating occurs.
Designed to last: the rugged metal housing has a spill-resistant design for long life in the lab under harsh conditions. The smooth, chemical-resistant ceramic top makes for easy clean-ups.

H-7537A
Guardian 3000 7"x7" Ceramic, Hotplate/Stirrer, 230V 50/60Hz.

$600.00

H-7537A.4F
Guardian 3000, 7"x7" Ceramic, Hotplate/Stirrer, 220V 50/60Hz

$600.00

Add to Saved Cart

Add Products to Saved Cart

All items with a quantity will be added.

Note: You will be directed to sign in or create an account. The cart will be created upon logging in if you continue. To add to an existing saved cart, Log In first.

Added to Shopping Cart

Cart Subtotal (1 ):

View Cart Checkout

The following items were already in your cart and have had their quantity increased. If you did not intend for this, we recommend that you edit your shopping cart.

Discover Additional Items