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CW-90 Over/Under Checkweigher

  • Membrane keypad consisting of ZERO, UNITS, PRINT, TARE, OVER, UNDER, ID, TARGET, 0-9, CLEAR, DECIMAL, ENTER, MENU, POWER
  • 304 stainless steel, IP66 rated indicator
  • PreVent™ breather vent
  • Storage for up to 50 IDs
  • Unit of measure: kg, gm, lb, oz, lb/oz (lb/oz is not Legal for Trade)
  • High-intensity LED display
  • Battery backed time and date
  • Two full-duplex RS-232 serial ports
  • Configurable print formats
  • Audit trail tracking
  • Optional communications: Ethernet, USB or fiber-optic
  • Four configurable Digital I/O
  • Reflash memory to upgrade firmware
  • Auto-print capability
  • Accumulator
  • Factory calibrated


  • Aluminum, environmentally sealed load cell
  • 304 stainless steel
  • Meets HACCP requirements
  • Five-point overload protection


Some approval documents are available to view by clicking the icons below.

NTEP Logo LOGO Measurementcanada Approved BW OIML Logo LOGO EU Legalfortrade Symbol Forcatalog UL_Listed_C-US CE Mark LOGO NSF CMYK

WARNING: Cancer and Reproductive Harm California Proposition 65

The Checkweigher of Choice

Rice Lake’s CW-90 checkweigher is designed to help speed up your weighing process and reduce production downtime, two critical factors to your company’s bottom line. Ease of use, real-time data collection, and rugged stainless steel construction make the CW-90 the equipment of choice for operators, quality control and maintenance departments. The CW-90 is competitively priced for all light industrial settings.

Easy to Configure

The configuration menu of the CW-90 is accessible through the front keypad, eliminating the need to open the back of the indicator and expose the unit to moisture or contaminants. Access to these keypad controls can be limited to meet the operator’s needs. The CW-90 will store detailed information for up to 50 separate IDs, allowing for easy recall of previously saved information. An adjustable contrast display is visible in any environment.

Simple to Maintain

The CW-90 has kept things simple to meet the needs of today’s lean manufacturers. Use this checkweigher by easily watching the over/under lights. Program the unit with specified weight limits and a red light will display an underweight condition, yellow for over, and green when a target weight is reached. Rice Lake’s CW-90 will help error-proof your production process and achieve your productivity goals

Power AC:
Line Voltages:
115/230 VAC
50/60 Hz

Power Consumption:
1.5 A at 115 VAC (8 W)
0.75 A at 230 VAC (8 W)

Measurement Rate:
960, 480, 240, 120, 60, 30, 15, 7.5 per second

System Linearity:
±0.01% full scale

Digital I/O:
Four channels on CPU board

Circuit Protection:
RFI, EMI, ESD protection

Large 0.8 in, 14 segment, six digit high-intensity red LED display

Scale Frame:
AISI304L, straight line finish, Ra=45 +/- 10

Scale Cover:
AISI304L, straight line finish, Ra=45 +/- 10

Designators for %, kg, gm, lb, oz, center of zero, G/B, N, T, PT, neg, motion

Operating Temperature:
Legal: 14 ºF to 104 ºF (-10 ºC to 40 ºC)

IP66, stainless steel

Display: 100,000

Load Cell:
Aluminum, environmentally sealed

Two-year limited

NTEP 08-092, Class III/IIIL 10,000 d
Measurement Canada AM-5710, Class III 10,000 d
OIML R76/2006-GBI-10.02
cULus listed
CE marked
NTEP 95-072, Class III 5,000 d
Measurement Canada AM-5082

Resources / Downloads

Title Download Email
CW-90 Checkweigher Catalog Page Download Email

Title Version Revision Download Email Category Archived
CW-90/90X Checkweigher Technical Manual 1.10 H Download Email Checkweighers|Indicators / Controllers|Weight Indicators No
CW-90/90X Checkweigher Firmware Update with Flash Magic Download Email Indicators / Controllers|Weight Indicators|Checkweighers No
Lantronix MatchPort User Guide D Download Email Bench Scales|Platform Scales No
WeighVault for CW-90/90X Installation Instructions B Download Email Indicator Software|Indicators / Controllers|Weight Indicators|Checkweighers No
WLAN Installation Instructions - CW-90/CW-90X/720i/820i/iQUBE²/LaserLT (Legacy Version) Download Email Indicator Hardware|Indicators / Controllers|Weight Indicators No
WLAN Option Installation Addendum for CW-90/90X, 720i, 820i, iQUBE2, LaserLT and Counterpart A Download Email Indicator Hardware|Indicators / Controllers|Indicator Hardware/Options No
CW-90/90X Checkweigh Indicator Overlay Replacement A Download Email Checkweighers|Indicators / Controllers|Weight Indicators No
WeighVault CW-90/90X Technical Manual C Download Email Software|Indicator Software|Weight Indicators|Checkweighers No
Ethernet TCP/IP Interface Installation/Configuration Manual - 720i/820i/920i Download Email Indicator Hardware|Indicators / Controllers|Weight Indicators No

Title Download Email
CW-90/CW-90X Replacement Parts Catalog Page Download Email

Title Collateral Wizard Request Download Email Category
CW-90 Over/Under Checkweigher Request Download Email Checkweighers|Bench Scales|Indicators / Controllers
WeighVault Application Brief Download Email Checkweighers|Software
Cannabis Market Weighing Solutions: From Cultivation to Retail Request Download Email Retail Equipment|Checkweighers
The Food Safety Modernization Act: Sanitary Design Principles and the Role of Scales in Food Processing Request Download Email Washdown Scales|Bench Scales|Floor Scales|Checkweighers|In-Motion Checkweighers

Title Version Size Release Date Download Email
CW-90/90X Firmware v1.10.01 1.10.01 105.8 KB 08/24/2023 Download Email

Title Version Size Release Date Download Email
WeighVault for CW-90 2.10.00 380.9 MB 02/06/2024 Download Email

Title View Email Category
Importance of Torque Recommendations for Assembly Download Email

Title View Download Email Category
ScaleTalk: What's the Difference Between a Checkweigher and Scale? And How to Configure a Range View Download Email
CW-90 Food Application View Download Email Platform Scales|Checkweighers|Indicators / Controllers
CW-90/90X Software Overview View Email Indicators / Controllers|Checkweighers|Platform Scales|Washdown Scales
CW-90/90X Hardware Overview View Download Email Checkweighers|Platform Scales|Washdown Scales|Indicators / Controllers
WeighVault for CW-90 Demonstration View Download Email Checkweighers|Weight Indicators
Analog Output Setup and Testing View Download Email Discontinued Weight Indicators|Checkweighers


115 VAC

Part # Description List Price Cart
105957 CKWGHER, CW90 10X10 5 lb/2.5 kg with 12 inch column 115VAC SST

List Price: $1,615.00

105958 CKWGHER, CW90 10X10 10 lb/5 kg with 12 inch column 115VAC SST

List Price: $1,615.00

105959 CKWGHER, CW90 10X10 25 lb/10 kg with 12 inch column 115VAC SST

List Price: $1,615.00

105960 CKWGHER, CW90 12x12 25 lb/10 kg with 12 inch column 115VAC SST

List Price: $1,675.00

105961 CKWGHER, CW90 12x12 50 lb/25 kg with 12 inch column 115VAC SST

List Price: $1,675.00

105962 CKWGHER, CW90 12x12 100 lb/50 kg with 12 inch column 115VAC SST

List Price: $1,675.00

230 VAC

230 VAC (CE marked/OIML approved)


Part # Description List Price Cart
200578 Ind OPT,Ethernet Interface CW90, CW90X Straight through 10ft ethernet cable with PG11 cord grip

List Price: $440.00

77142 Ind OPT,Ethernet Interface 720i, 820i, iQube, CW90, CW90X

List Price: $420.00

206272 Ind Opt,Wireless LAN Card RS232/WiFi Interface 802.11 A/B 10/100 XPico for CW90,720i,iQube2

List Price: $610.00

171968 Cable,RS-232 5-Wire DB-9F to stripped and tinned leads

List Price: $39.00

96736 Ind Opt,Fiber-Optic Rx/Tx CW90, CW90X, 820i Internal Mount With Bus Power

Call for price

78026 Cable,Plastic Optical 100 ft. includes polishing kit

List Price: $175.00

80892 Cutter, Fiber Optic Disposable, .750 and 1.0mm single and duplex jacket Industrial Fiber Optics #IF-FC2

List Price: $12.00

117358 Software, WeighVault for CW90/90X License (English)

List Price: $265.00

Replacement Parts

Replacement parts can only be purchased through trained and authorized dealers. You must be logged in as a dealer to view any available replacement parts.

To locate a dealer in your area, please call us at 1-800-472-6703 or fill out a request online.

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