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EM-500 Inline Chlorophyll-a Algae Sensor
- Product Details
- Specifications
- Cooling Water & Algae Control
EM-500 Inline Chlorophyll-a Algae Sensor
The Pyxis EM-500 is an inline fluorometer that measures chlorophyll-a, the green pigment in living algae. Because only live cells fluoresce, the reading tracks the amount of growing algae in the water, so a problem can be seen and treated before it takes hold.
The sensor fits the ST-001 tee supplied with it, or hangs in a tank with the optional submersion adapter. It sends its reading to any controller through an isolated 4–20 mA output or RS-485 Modbus, and can be checked, cleaned and calibrated from a phone or computer with the uPyxis® app.
Models
- EM-500: 0.1 – 50 ppb chlorophyll-a
- EM-510: 0 – 500 ppb chlorophyll-a
Corrects for Colour and Turbidity
Coloured or cloudy water upsets most inline fluorometers. The EM-500’s optics and flow path compensate for colour up to 10 ppm (as iron) and turbidity up to 150 NTU, so the reading stays on the algae rather than on what else is in the water.
EM-500 Specifications
| Item | EM-500 | EM-510 |
|---|---|---|
| Part Number | 50501 | 50502 |
| Chlorophyll-a Range | 0.1 – 50 ppb | 0 – 500 ppb |
| Precision | ±0.2 ppb | ±1 ppb |
| Excitation / Emission | 470 nm / 675 nm | |
| Compensation | Colour up to 10 ppm (as iron); turbidity up to 150 NTU | |
| Calibration | Factory calibrated with live algae; zero and slope calibration against a chlorophyll-a standard | |
| Outputs | Isolated 4–20 mA and isolated RS-485 Modbus | |
| Wireless Access | Bluetooth® via MA-WB or PowerPACK adapter, uPyxis® mobile or desktop app | |
| Power Supply | 24 V DC, about 1 W | |
| Connector | IP67 waterproof 7-pin connector | |
| Cables Included | 1.5 m 7-pin bulkhead cable and 1.5 m 7-pin flying lead cable, with adapters | |
| Installation | ST-001 tee with ¾" NPT thread and socket union (supplied) | |
| Sample Flow | 0 – 30 L/min (0 – 8 US gpm) | |
| Maximum Pressure | 0.7 MPa (100 psi) at 40 °C (104 °F) | |
| Operating Temperature | 0 – 40 °C (32 – 104 °F) | |
| Storage Temperature | -20 – 60 °C (-4 – 140 °F) | |
| Housing Material | UPVC | |
| Dimensions (L × D) | 172 mm × 36.6 mm (6.8" × 1.44") | |
| Weight | 170 g (0.37 lb) | |
| Typical Service Life | 2 – 3 years | |
| Approvals | CE, RoHS | |
| Warranty | 13 months | |
Ideal for Cooling Water & Algae Control
Algae foul cooling towers, heat exchangers and process water systems, and feed the bacteria that follow. The EM-500 gives a live measure of algae growth in industrial cooling and process water, so algaecide can be dosed when it is needed rather than on a timer. Where it drives dosing, the control system should still cap pump run time or alarm on high feed, in case heavy fouling lowers the reading.
Key Features
- Measures chlorophyll-a in live algae (470 nm excitation, 675 nm emission)
- Two ranges: 0.1 – 50 ppb (EM-500) and 0 – 500 ppb (EM-510)
- Automatic compensation for colour (to 10 ppm as iron) and turbidity (to 150 NTU)
- Factory calibrated against a live algae sample
- Isolated 4–20 mA and RS-485 Modbus outputs
- Bluetooth® cleanliness check and calibration through the uPyxis® app
- Short flow channel that is quick to clean, removed from the tee without tools
- ST-001 ¾” tee supplied; submersion adapter available
- Low power: 24 V DC, about 1 W
- Compact UPVC body, 170 g
