Pyxis SP-800, SP-208 OXIGO and SP-210 Handheld Colorimeters and Concentration Meters

The Pyxis SP-800, SP-208 OXIGO and SP-210 are three handheld optical analyzers that work on different measuring principles. The SP-800 is a multi-parameter, reagent-based colorimeter and turbidimeter. The SP-208 is a single-purpose DPD colorimeter focused on free and total chlorine. The SP-210 measures bleach (sodium hypochlorite) concentration directly by UV absorbance, without reagent. In Turkey, Mikron Proses (Üsküdar, Istanbul) provides application consulting on selecting the right instrument for your parameter set.

Parameter set · Reagent choice · Instrument selection → Send us your requirement

For an overview of portable instruments, see the guide on handheld water analyzers. For the same brand’s fluorometers and multimeters, see the handheld fluorometers and SP-505 and SP-600 multimeters pages.

SP-800: multi-parameter colorimeter and turbidimeter

The SP-800 makes colorimetric measurements at 7 LED wavelengths (365, 420, 455, 525, 560, 570 and 630 nm, wavelength accuracy ±1 nm) and measures turbidity by the direct-read true turbidity method with a white light / IR LED in the range 0-200 NTU, with a detection limit of 1 NTU. Absorbance repeatability is 0.005 Au in the range 0-1.5 Au (3-sigma), and the linearity range is 0-1.0 Au.

The instrument supports more than 65 reagent-based methods documented in the manufacturer’s datasheet. Some of them comply with APHA/USEPA/ISO guidelines, and others are direct-read or wet chemistry methods specific to Pyxis Lab, such as bleach concentration direct read (high 0.5-16.0% and low 0.015-1.5%), calcium, alkalinity, sulfite and non-hazardous zinc. The SP-800 works directly with industry-standard colorimetric reagents and with Pyxis and other solid or liquid reagents, and a live concentration-time curve is shown on the screen during each test. For the sample, a 10 mL (MA-24) or 25 mL (MA-25) glass vial is used; a 16 mm COD vial adapter is also supplied as standard. The instrument measures 265 × 88 × 62 mm and weighs 600 g (without batteries); it runs on (4) AA alkaline batteries with a typical battery life of 6 months, has a 160 × 240 pixel graphical LCD and is rated IP67.

SP-208 OXIGO: pocket free/total chlorine colorimeter

The SP-208 is a pocket colorimeter focused only on free and total chlorine measurement. It offers two measuring ranges: a low range of 0.02-2.2 ppm and a high range of 0.1-10 ppm (both for free or total chlorine). The measurement is made with conventional or Pyxis Lab DPD powder reagent pillows, and the manufacturer states that the instrument meets the EPA 334.0 DPD test guidelines. A 10 mL / 24 mm diameter cuvette (MA-24) is used for the sample. The instrument stores up to 30,000 groups of data via Bluetooth and has a 340 × 220 TFT-LCD display. The body measures 170 × 80 × 45 mm and weighs 400 g; it runs on (4) AA alkaline batteries (typical battery life 10,000 readings) and is rated IP67.

SP-210: reagent-free bleach concentration meter

The SP-210 works on a different principle from the SP-800 and SP-208: it is a UV absorbance instrument in which the sample is poured directly into the measuring cell, with no reagent or cuvette. It measures optical density with an LED-based UV light source at 365/395 nm wavelengths (±1 nm) and reports it as 0.01-16% mass/mass as Cl2, for both concentrated and dilute sodium hypochlorite solutions from electrolysis. The accuracy is ±2% of reading or ±0.1% of unit range (whichever is greater). Absorbance repeatability is ±0.005 Abs in the range 0-1.0 Abs, and the linearity range is 0-2.0 Abs. A built-in RTD temperature sensor applies automatic temperature compensation and shows the sample temperature in °F/°C; because ambient light is compensated by the algorithm, the sample does not need to be shielded from light. The body measures 170 × 80 × 45 mm and weighs 400 g (without batteries); it runs on (4) AA alkaline batteries (typical battery life 3,200 readings, 480 mAh), includes Bluetooth and is rated IP67.

Which instrument for which measurement

The SP-800 is preferred in laboratory or field settings where a wide range of parameters is needed (more than 65 methods). The SP-208 is a more compact solution when only a quick, single-purpose field check of free and total chlorine is needed. The SP-210 is used where the concentration of raw or dilute bleach has to be measured directly, without reagent or cuvette. Tell us which parameter set you want to measure, and we can assess together which instrument suits your site.