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  • Measuring Ranges: 200μS, 2mS, 20mS, 200mS / 200, 2000, 20000, 200000 ppm / 0-12% (Salinity).
  • Measures conductivity, total dissolved solids (TDS) and salt levels in water.
  • Automatic temperature compensation.
  • Real time datalogger with integral SD memory card (optional).
  • Includes hard carrying case, probe and batteries.
  • Imported from USA.

The Reed SD-4307 portable multiparameter meter provides
electrical conductivity, total dissolved solids (TDS), salinity,
and temperature readings for water quality testing applications,
and has automatic temperature compensation and an LCD screen.
This meter has automatic temperature compensation (ATC) for
accurate readings in fluctuating temperatures, and provides
single or multi-point calibration to a standard conductivity
value. The backlit, 38mm x 52mm (H x W) LCD screen provides clear
readings in bright or dim lighting. (H is height, the vertical
distance from the lowest to highest point; W is width, the
horizontal distance from left to right.) The electrode housing is
made of carbon for durability and long life. The meter has an
integrated SD memory card slot to enable automatic or manual data
logging with a sampling time between 1 second and 9 hours. It has
a USB 2.0 port and RS-232 interface to allow data transfer to a
computer. It has a data hold function and can record the recent
maximum and minimum readings for later review. The unit operates
on six 1.5V AA batteries, and can be set to turn off
automatically after a short period of inactivity to conserve
battery life. It has a low-battery indicator that signals when
the battery needs to be replaced. It comes with a probe, a
hard-sided carrying case, and instructions. This meter is
suitable for water testing applications in hydroponics, fresh
water systems, and aquaculture.


Conductivity range (autoranging) and resolution
0 to 200.0μS with resolution of 0.1μS
0.2 to 2.000mS with resolution of 0.001mS
2 to 20.00mS with resolution of 0.01mS
20 to 200.0mS with resolution of 0.1mS

Conductivity accuracy
+ or - (2% of the full scale + 1d) at 23 degrees C + or - 5
degrees C

Salinity range and resolution
0 to 12% salt (% weight) with a resolution of 0.01%

Salinity accuracy
0.5% salt value

TDS (total dissolved solids) range and resolution
0 to 132ppm with resolution of 0.1ppm
132 to 1,320ppm with resolution of 1ppm
1,320 to 13,200ppm with resolution of 10ppm
13,200 to 132,000ppm with resolution of 100ppm

TDS accuracy
+ or - (2% of the full scale + 1d) at 23 degrees C + or - 5
degrees C

Temperature range and resolution
0 to 50 degrees C/0 to 122 degrees F with resolution of 0.1
degree C/0.1 degree F

Temperature accuracy
+ or - 0.8 degrees C/1.5 degrees F

38mm x 52mm (H x W) LCD with backlight

6 AA batteries


Meter: 177 x 68 x 45mm/7.0 x 2.7 x 1.9 inches (H x W x D)
Probe: 22mm Dia. x 120mm Length

H is height, the vertical distance from the lowest to highest
point; W is width, the horizontal distance from left to right; D
is depth, the horizontal distance from front to back.

A multiparameter meter is a benchtop or handheld device that can
take multiple readings on a single sample. It measures parameters
such as the pH level (acidity or alkalinity of a substance),
conductivity (the amount of salts or other compounds present in
water), dissolved oxygen (DO, the amount of oxygen in a liquid),
temperature, total dissolved solids (TDS, anything present in
water other than the pure water molecule and suspended solids),
salinity, resistivity, and oxidation reduction potential (ORP).
Applications for multiparameter meters include water testing,
pharmaceuticals, agriculture, winemaking, water-treatment plants,
and acquaculture. Devices with a benchtop body are often used for
indoor laboratory use or in a manufacturing setting; handheld,
portable devices are typically used for fieldwork. Sensors are
used with a meter to measure the parameters of a substance.

Reed Instruments manufactures test and measurement equipment such
as pressure gauges, electrical testers, temperature and humidity
instrumentation, and inspection instruments. The company, founded
in 2004, is headquartered in Wilmington, NC.

What's in the Box?

* Reed SD-4307 portable multiparameter meter
* Electrode probe
* Carrying case
* Instructions


REED Instruments SD-4307 SD Series Conductivity/TDS/Salinity Datalogger


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