Contact us 
My Experiments 
Portable, Dual-Source Turbidity Meter for EPA and ISO Compliant Water Testing
The Thermo Scientific™ Orion™ AQ4500 Turbidimeter is a field-ready, IP67-rated instrument engineered for accurate turbidity measurement in drinking water, wastewater, and environmental samples. Featuring dual LED light sources and full compliance with both EPA 180.1 and ISO 7027, this meter is designed to adapt to global testing protocols and regulatory requirements. Its intuitive operation, long battery life, and extensive measurement range make it the ideal tool for portable, accurate turbidity assessment.
Key Features
- Dual Light Sources: White light (EPA 180.1) and Infrared (ISO 7027)
- Multiple Measurement Modes: EPA 180.1, ISO Nephelometric, ISO Absorbance, %T, EBC, ASBC
- Wide Measurement Range: 0 to 4000 NTU
- Autoranging with Nephelometric and Ratiometric Modes
- IP67 Waterproof Housing: Built for rugged field use
- Data Logging: Stores 100 time- and date-stamped data points
- Extended Battery Life: 2500 hours of intermittent use (AA batteries)
- USB Connectivity: Data export with optional RS232 cable (AQ4CBL)
Applications
- Drinking Water Monitoring – EPA-approved compliance testing
- Wastewater Discharge – Process control and turbidity verification
- Environmental Field Testing – Surface and raw water sampling
- Industrial Water Systems – Quality assurance and clarity checks
- Food & Beverage Industry – Regulatory and process control testing
Technical Specifications
| Specification | Details |
|---|---|
| Type | Turbidity Meter |
| Light Source | Dual LED (White & IR) |
| Display | LED |
| Measurement Range | 0 – 4000 NTU |
| Units | NTU, FTU, FNU, EBC, ASBC |
| Automatic Range Selection | Yes |
| EPA Approved Methods | EPA 180.1 |
| ISO Accepted Methods | ISO 7027 |
| Memory | 100 readings (time- and date-stamped) |
| Battery Life | Approx. 2500 hours (intermittent use) |
| Interfaces | USB (with optional RS232 cable) |
| Protection Rating | IP67 waterproof |
| Compliance | US EPA 40 CFR Part 141, vol. 74, no. 147 |
| Unit Size | Each |
Included in Delivery
- AQ4500 Meter
- Calibration Kit (Set of 5 EPA-approved primary standards)
- 7 Glass Vials
- User Guide
- Carrying Case
Optional Accessories:
- AC45ST: Primary Calibration Standards Kit
- AC2T24: Replacement Vials (Pack of 12)
- AC45S1: Silicone Oil and Cloth Kit
- AQ4CBL: RS232 Data/Method Upload Cable
The Orion™ AQ4500 Turbidimeter delivers regulatory-compliant, lab-grade turbidity testing in a compact and rugged portable format. Whether used in municipal water treatment, industrial QA, or field sampling, its dual-source versatility and reliable performance ensure it meets the demands of today's water quality professionals.
Brochure
user manual
Portable, Dual-Source Turbidity Meter for EPA and ISO Compliant Water Testing
The Thermo Scientific™ Orion™ AQ4500 Turbidimeter is a field-ready, IP67-rated instrument engineered for accurate turbidity measurement in drinking water, wastewater, and environmental samples. Featuring dual LED light sources and full compliance with both EPA 180.1 and ISO 7027, this meter is designed to adapt to global testing protocols and regulatory requirements. Its intuitive operation, long battery life, and extensive measurement range make it the ideal tool for portable, accurate turbidity assessment.
Key Features
- Dual Light Sources: White light (EPA 180.1) and Infrared (ISO 7027)
- Multiple Measurement Modes: EPA 180.1, ISO Nephelometric, ISO Absorbance, %T, EBC, ASBC
- Wide Measurement Range: 0 to 4000 NTU
- Autoranging with Nephelometric and Ratiometric Modes
- IP67 Waterproof Housing: Built for rugged field use
- Data Logging: Stores 100 time- and date-stamped data points
- Extended Battery Life: 2500 hours of intermittent use (AA batteries)
- USB Connectivity: Data export with optional RS232 cable (AQ4CBL)
Applications
- Drinking Water Monitoring – EPA-approved compliance testing
- Wastewater Discharge – Process control and turbidity verification
- Environmental Field Testing – Surface and raw water sampling
- Industrial Water Systems – Quality assurance and clarity checks
- Food & Beverage Industry – Regulatory and process control testing
Technical Specifications
| Specification | Details |
|---|---|
| Type | Turbidity Meter |
| Light Source | Dual LED (White & IR) |
| Display | LED |
| Measurement Range | 0 – 4000 NTU |
| Units | NTU, FTU, FNU, EBC, ASBC |
| Automatic Range Selection | Yes |
| EPA Approved Methods | EPA 180.1 |
| ISO Accepted Methods | ISO 7027 |
| Memory | 100 readings (time- and date-stamped) |
| Battery Life | Approx. 2500 hours (intermittent use) |
| Interfaces | USB (with optional RS232 cable) |
| Protection Rating | IP67 waterproof |
| Compliance | US EPA 40 CFR Part 141, vol. 74, no. 147 |
| Unit Size | Each |
Included in Delivery
- AQ4500 Meter
- Calibration Kit (Set of 5 EPA-approved primary standards)
- 7 Glass Vials
- User Guide
- Carrying Case
Optional Accessories:
- AC45ST: Primary Calibration Standards Kit
- AC2T24: Replacement Vials (Pack of 12)
- AC45S1: Silicone Oil and Cloth Kit
- AQ4CBL: RS232 Data/Method Upload Cable
The Orion™ AQ4500 Turbidimeter delivers regulatory-compliant, lab-grade turbidity testing in a compact and rugged portable format. Whether used in municipal water treatment, industrial QA, or field sampling, its dual-source versatility and reliable performance ensure it meets the demands of today's water quality professionals.
![[48011050] Lovibond® T-CAL® Turbididity Standard (0.30 NTU, 500 ml)](/web/image/product.product/40710/image_512/%5B48011050%5D%20Lovibond%C2%AE%20T-CAL%C2%AE%20Turbididity%20Standard%20%280.30%20NTU%2C%20500%20ml%29?unique=96c5da2)
![[AC2T24] Thermo Scientific™ Orion™ AQUAfast™ AQ4500 Turbidity Meter Accessories (Replacement Turbidity Vials, 12/pk)](/web/image/product.product/23107/image_512/%5BAC2T24%5D%20Thermo%20Scientific%E2%84%A2%20Orion%E2%84%A2%20AQUAfast%E2%84%A2%20AQ4500%20Turbidity%20Meter%20Accessories%20%28Replacement%20Turbidity%20Vials%2C%2012-pk%29?unique=96c5da2)