AlpHa Measurement Solutions |
pH in Pool & Spa
pH in Pool & Spa
The measurement and control of pH is critical to the safety and comfort of the occupants. For example, if the pH is too low, pool and spa occupants may experience skin and eye irritation or even respiratory issues. If the pH is too high, chlorination (disinfection) may be less effective, and the water may be more prone to cloudiness, odor, and scale formation. Pool and spa environments typically measure pH continuously in larger commercial control systems but may also be measured by a service provider with grab-sample methods. Common performance challenges can be mitigated with the optimal sensor design, in particular the reference junction design, housing material, and sensing chemistry.
- pH Range: 0 to 14 pH
- Response Time: 10s
- Drift: ±0.05 pH (in 24 hours)
- Accuracy: ±0.02 pH
- Temperature Range: -5 to 135°C
- Warranty: 12 Months
- Form Factor
- 12 mm
- Process Body
- Cartridge
- Custom Options Available
- Housing Material Options
- Glass
- Polycarbonate
- ABS
- Epoxy
- Ryton® (PPS)
- Kynar® (PVDF)
- Polyethylene
- PEEK
- PVC / CPVC
- Teflon™ (PTFE)
- Ultem® (PEI)
- Metal
- Stainless Steel
- Other Metals Available
- Thermistor Options
- PT100 (type A & B)
- PT1000
- 10 kohm
- 30 kohm
- 100 kohm
- Any commercially available thermistors and custom options
- Common temperature accuracy is ±0.3°C and can vary based on thermistor option chosen
- Reference System
- Ag / AgCl
- Differential
- Custom Options Available
- Reference Junction Options
- Single Junction
- Double Junction
- Custom Options Available
- Reference Junction Material / Design
- Fiber / Pellon
- Ceramic Pin / Annular / Disc
- Open Aperture
- Porous Plastic (PTFE / HDPE / PP)
- Sleeve Junction / Free Flow (liquid / liquid or ground glass joint)
- Solid State
- Custom Options Available
- Solution Ground
- Integrated in Thermowell
- Integrated in Body Housing
- Stand-alone
- Custom Options Available
- Reference Electrolyte
- Sealed
- Soft Gel
- Solid Gel
- Refillable
- Liquid
- Soft Gel
- Custom Options Available
- Sealed
- Glass Sensor Shape
- Bulb
- Dome
- Flat
- Semi Micro
- Integrated Insertions
- 1/2" NPT
- 3/4" NPT
- 1" NPT
- PG 13.5
- Custom Options Available
- Analog
- Millivolts
- 4 – 20 mA
- 0 – 5 V
- 0 – 10 V
- Custom Options Available
- Custom options available with preamp capabilities
- Digital
- RS-485 MODBUS RTU
- Custom Options Available
- Connectors
- Integrated Connectors (detachable or cableless)
- S7
- S8
- Integrated BNC
- Variopin
- Custom Options Available
- Connectors with Cables (including temperature)
- BNC
- DIN
- MOLEX
- Tinned Leads
- Mil-spec
- 2.5 mm / 3.5 mm phono
- RCA
- Spade Lugs
- LEMO
- Circular Connectors
- Any commercially available connectors and custom options available
- Integrated Connectors (detachable or cableless)
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