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Ohaus Defender 5000 Square Bench Scales
Ohaus Defender 5000 Square Scales Bench Scales

Specifications Chart

Smart Functionality, Durability, OHAUS Quality and Value

The OHAUS DefenderTM 5000 Series is a feature-rich line of bench scales, combining an ABS plastic T51P indicator with rectangular painted steel bases and columns. Ideal for shipping and receiving, production, packaging and general commercial and industrial weighing applications, the Defender 5000 offers a multifunctional indicator with multiple weighing units and software modes to meet the requirements of industrial and lab applications. With rugged construction, comprehensive yet intuitive software and multiple connectivity options, the Defender 5000 can meet the needs of demanding industrial operations

    Standard Features Include
  • Painted steel base with ABS indicator
  • 5,000-7,500d default resolution
  • NTEP Certified / Measurement Canada Approved resolution up to 1:3,000
  • Quick display of results using large LCD with high-contrast white backlight
  • Temporary display of 10x readability in weighing mode using quick key press
  • Easy to operate with 4-key membrane keypad with raised tactile keys
  • Weighs in one or more units: kg, g, lb, oz, lb:oz (decimal), metric tonnes and user-definable custom unit
  • Multiple weighing modes including Counting, Percent Weighing, Dynamic/Animal Weighing, Checkweighing, and Display Hold
  • Internal power supply with universal line cord or 6 ?C? batteries (80 hour battery life) ? optional NiMH internal rechargeable power pack available
  • Includes RS232 interface with GMP/GLP data output including date and time
  • Base and indicator connected using quick connect plug
  • Optional interfaces include DC relay control kit, AC relay control kit, 2nd RS232 and RS485/422

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Ohaus Defender 5000 Square Bench Scales

Legal for Trade
NTEP & Measurement Canada

FREE UPS Ground Shipping
(within the 48 continental US States)

For a limited time only
Add to Cart to see Price


TAL Software (SW12W), Add $631.80
Second RS232 Interface Kit (80500733), Add $73.00
RS232 Cable, PC 25-pin (80500524), Add $228.60
Cable for 802521992 Thermal Printer (80252581), Add $228.60
Ohaus SF40A Portable Dot-Matrix Impact Printer, Add
Palm-Sized Thermal Printer (80251992), Add $854.25
Stainless Steel Scoop (80250400), Add $45.00
Painted Steel Column Mount Kit 26.75 in (80500724), Add $91.80
Painted Steel Column Mount Kit 13.75 (80500723), Add $83.60

The Defender 5000 Offers Multiple Features and Easy Configuration:

To meet different operational needs, the Defender 5000 includes a suite of configurable software
  • Counting mode for packaging and inventory control, enabling counting into a container or out of a container for bulk operations. Supports a maximum counting resolution to 1:300,000 (minimum APW equal to 0.1d), selectable auto- optimization of average piece weight (APW). APW data can be displayed at any time using a quick key press.
  • Percent Weighing mode for formulation and mixing applications, with display of reference weight with quick key press.
  • Dynamic/Animal Weighing with selectable weigh times from 0-60 seconds.
  • Checkweighing function for packaging and weight checking, with display of results using LCD display and red/yellow/green LEDs. Audible beeper can be configured to prompt when weight is within range, under, over, or under or over range. Target weight values can be displayed at any time using a quick key press.
  • Display Hold mode for weighing large packages holds last stable weight on display until cleared
  • The Defender 5000 weighs in one or more user-selectable units: kg, g, lb, oz, lb:oz (decimal), metric tonnes and user-definable custom unit
  • Supports GMP/GLP data output with date, time user ID, project ID and scale ID. The Defender 5000 features selectable print options for data and print format
  • To limit operator access to functions, the Defender 5000 offers both software lockouts for menu items as well as individual key functions.
  • High-Visibility LCD Display with bright white LED backlight and fast display stable weight within 2 seconds
  • Internal Slot for Capacity Label Protects label from the effects of moisture and external environments
  • Reversible Rear Housing Cables can exit above (table or front scale mounting) or below (wall or bench scale mounting) for convenient mounting. Front scale mounting with available accessory. Internal structural ribs provide strength and minimize flexing.
  • One-Key, Multiple Mode Selection Counting, Dynamic Weighing, Display Hold, Percent Weighing and Checkweighing
  • Stay Connected Built in RS232 bi-directional interface and external input, optional RS422/485, optional second RS232 and optional AC or DC relay
  • Plug-in Load Cell Connector Allows for simple connection to Defender bases or directly to terminal block
  • Durable Base Frame Construction Stainless steel pans and painted steel form-and-weld frames (R, L bases) provide maximum durability, rigidity and structural integrity. Load-unload cycle tested to ensure long-term performance
  • Fully Adjustable Feet Four rugged, adjustable feet help prevent slippage on wet or uneven surfaces
  • Painted Steel Columns Available in both short and tall lengths
  • Universal Switching Power Supply 100-240 VAC with AC line cord; no need for an external AC adapter
  • Included Table/Wall Mount Bracket With large ergonomic adjustable knobs to maximize viewing angles. A ratchet-type angle adjustment with metal inserts ensure that viewing angles are set securely, and lasts a long time even with frequent adjustments
  • Simple Plug-In Battery Installation Use six C- alkaline batteries or the optional NiMH battery
  • 3-Color LED Checkweigh Indication with configurable beeper alert


T51P: ABS plastic housing with internal rib reinforcements, reversible rear cover, backlit LCD weight display, checkweighing indication (green, yellow, red), membrane keypad with raised tactile keys, built-in bi-directional RS232 with manual/continuous/interval printing, external tare input, hardware configuration lockout switch, internal switching power supply with line cord and battery power using 6 ?C? cell batteries.

Other Features

Zero point calibration, calibration test, span or linear calibration, selectable auto-zero tracking range, selectable stability range, selectable averaging level, selectable LCD backlight, selectable auto shutoff, retain zero weight data after power-off, Geo geographical adjustment, selectable key beep, key function lock, menu lock, selectable power-on and calibration unit, battery status display, display of gross/net weight, indication of stability, center of zero, over- and underweight, overload and underload conditions. Configuration menus for PRINT1, PRINT2, COM1, COM2, and I/O.


  • Legal for Trade: NTEP (CC No. 08-039 for indicator; 99-203A3 for bases); Measurement Canada (Approval No. AM-5687 for Indicator; AM-5675 for bases)
  • Safety and EMC: cULus 2005/95/EC low voltage directive: EN60950-1:2001, FCC Part 15 Class A 2004/108/EC EMC directive: EN61326-1:1997; +A1:1998; +A2:2001; + A3>2003
  • Other: Compliant to Directive 2002/96/EC on waste electrical and electronic equipment (WEEE)
  • Quality: OHAUS quality management system registered to ISO 9001:2008

Bench Square Scales

Model Number

D51P10QR1 D51P25QR1 D51P100QL2 D51P250QX2
D51P10QR1 D51P25QR1 D51P100QL2 D51P250QX2


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Capacity x Readability

25 lb x 0.002 lb 50 lb x 0.005 lb 250 lb x 0.02 lb 500 lb x 0.05 lb
400 oz x 0.05 oz 800 oz x 0.1 oz 4000 oz x .5 oz 8000 oz x 1 oz
25 lb : 0.05 oz 50 lb x 0.1 oz 250 lb : .5 oz 500 lb : 1 oz
10 kg x 0.001 kg 25 kg x 0.002 kg 100 kg x 0.01 kg 250 kg x 0.02 kg
10000 g x 1 g 25000 g x 2 g 100000 g x 10 g 250000 g x 20 g

Maximum Displayed Resolution

1:10000 1:12500 1:10000 1:12500
Platform Size 12 x 12 x 3.8 in
30 x 30 x 10 cm
18 x 18 x 3.75 in
45 x 45 x 10.4 cm
24 x 24 x 5 in
60 x 60 x 12.7 cm
Legal for Trade NTEP(CC No. 08-039 for indicator; 01-048A1 for bases);
Measurement Canada(Approval No. AM-5687 for indicator; AM-5719 for bases)

Capacity x Readability

25 lb x 0.005 lb 50 lb x 0.01 lb 250 lb x 0.05 lb 500 lb x 0.10 lb
10 kg x 0.002 kg 25 kg x 0.005 kg 100 kg x 0.02 kg 250 kg x 0.05 kg
Maximum Certified Resolution 1:5000 1:5000 1:5000 1:5000
Column 13.8 in / 350 mm painted steel 26.8 in / 680 mm painted steel
Safe Overload Capacity 150% of maximum capacity
Indicator Model T51P
Construction ABS plastic indicator, stainless steel removable weighing platform, painted steel column and base construction, aluminum loadcell
Protection Dry use for scale, IP67 for loadcell
Weighing Units lb, oz, lb:oz, kg, g, custom unit
Modes Static Weighing, Dynamic Weighing, Counting, Checkweighing, Percent Weighing, Display Hold
Display 1 in / 25mm high 6-digit, 7-segment bright white backlit LCD
Keyboard 4-button membrane switch
Stabilization Time Within 2 seconds
Auto-zero Tracking Off, 0.5, 1 or 3 d
Zeroing Range 2% or 100% of capacity
Calibration Span 1 kg or 1lb to 100% of capacity / 3-point linearity (0 - 50% ? 100% fixed)
Power 100-240 VAC / 50-60Hz internal universal power supply, 6 ?C? cell batteries (not supplied) with 80 hour life
Interface RS232 and external input
Operating Temperature Range 14°F to 104°F / -10°C to 40°C
Shipping Dimensions
(L x W x H)
19.3 x 16.1 x 17.3 in
490 x 410 x 440 mm
31.2 x 23.6 x 9.5 in
810 x 600 x 240 mm
39.4 x 29.9 x 9.8 in
1000 x 760 x 250 mm
Net Weight 32.4 lb / 14.7 kg 66.6 lb / 30.2 kg 83.8 lb / 38.0 kg
Shipping Weight 37.7 lb / 17.1 kg 71.4 lb / 32.4 kg 97.9 lb / 44.4 kg

Model Number

D51P10QR1 D51P25QR1 D51P100QL2 D51P250QX2

Scale Dimensions
(W x H1 x D1 x D2)

12 x 3.7 x 23.2 x 12 x 16.7 in
305 x 95 x 590 x 305 x 425 mm
18 x 4.5 x 37 x 18 x 22.7 in
457 x 115 x 940 x 457 x 577 mm
24 x 5.4 x 37 x 24 x 28.7 in
610 x 137 x 940 x 610 x 730 mm





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