For over a century, OHAUS has perfected the art of measurement through our line of weighing products. Taking the same approach to our weighing equipment, OHAUS now delivers Starter ST400D - a practical, affordable, low-maintenance DO Portable Meter equipped with optical technology. The ST400D is ideal for applications that require simple yet accurate DO measurements.

APPLICATIONS: Field and lab Dissolved Oxygen measurement

DISPLAY: Backlit Color Liquid Crystal Display (LCD)

OPERATION: 4 AAA batteries (included)

COMMUNICATION: N/A

CONSTRUCTION: ABS Housing

DESIGN FEATURES: 99 measurement memory, last calibration data recall, auto barometric pressure measurement, auto temperature compensation with manual salinity compensation

FEATURES

• Optical DO probe requires minimal maintenance and offers immediate measurement readings. No warm up or sample preparation needed.
• Large backlit LCD screen provides easy to read results - even in low light environments. Ideal for secure field use with a meter stand, wrist strap and durable IP54 housing./li>
• The 99-measurement library stores data for future reference and allows for easy one-touch recall of the last calibration data.

Product Specifications

Measurement Range	0.00 – 20.0 mg/L(ppm); 0 – 50°C
Measurement Resolution	0.01 mg/L; 0.1%; 0.1 °C
Accuracy	±0.2 mg/L(< 8 mg/L) or ±0.3 mg/L(8~20 mg/L); ±0.3 °C
Display	Color LCD Graphics
Electrode	Not included)
Included Accessories	154 Sets, Electrode Clip, Wrist Strap and 4 AAA Batteries
Accuracy D0	0.2 ppm
Accuracy ± (Temperature)	0.3 °C
Battery Life	12 hours with Disposable Batteries
Calibration	2 Point
Dimensions	5.91 in x 1.38 in x 3.54 in (150 mm x 35 mm x 90 mm) (LxHxW)
Parameter	Dissolved Oxygen
Power	4 AAA (LR03) Batteries (Included)
Net Weight	0.35 lb (0.16 kg)
Resolution (DO)	0.01
Temperature compensation	Automatic
Temperature resolution	0.1 °C
Temperature Sensor	10 KO NTC
Working Environment	41°F – 104°F, 80%RH, non-condensing (5°C – 40°C, 80% RH, Non-condensing)

Model		ST400			ST400M
		ST400-B 30468964	ST400-F 30468965	ST400-G 30468966	ST400M-B 30468990	ST400M-F 30468991	ST400M-G 30468992
Includes		ST400	ST400, electrode	ST400, electrode, case	ST400M	ST400M, electrode	ST400M, electrode, case
Measuring Range	pH	-2 … 16.00 pH
	mV	-1999 …1999 mV
	Conductivity	-			0.0 μS/cm ... 199.9 mS/cm
	TDS	-			0.1 mg/l … 199.9 g/l
	Salinity	-			0.0 … 99.9 psu
	Resistivity	-			0… 20MΩ•cm
	Temperature	-5 °C ... 110 °C
Resolution	pH	0.01 pH
	mV	1 mV
	Conductivity	-			0.1 μS/cm, Auto-range
	TDS	-			0.01 mg/l, Auto-range
	Salinity	-			0.01 psu, Auto-range
	Resistivity	-			0.01Ω•cm, Auto-range
	Temperature	0.1 °C
Accuracy	pH	± 0.01 pH
	mV	± 1 mV
	Conductivity	-			± 0.5% F.S.
	TDS	-			± 0.5% F.S.
	Salinity	-			± 0.5% F.S.
	Resistivity	-			± 0.5% F.S.
	Temperature	± 0.5 °C			± 0.3 °C
Calibration	pH	1-5 points, 6 predefined buffer groups			1-5 points, 6 predefined buffer groups
	Conductivity	-			1 point, 5 predefined standards
Memory		1000 measurements 5 calibration data for each sensor ID			1000 measurements (pH + conductivity) 5 calibration data for each sensor ID
Power Supply		Rechargeable Li-battery, 2600mAh; > 300 charge and discharge times
Size/Weight		Approximately 100W × 230 L × 40 H mm / 0.35 kg
Display		LCD with Backlight
Input	pH	IP67 BNC, impedance > 10e+12 Ω
	Conductivity	IP67 Cinch, NTC 30 k
	Conductivity	-			IP67 LTW
Temperature Compensation	pH	ATC & MTC
	Conductivity	-			ATC, Linear: 0.00 / °C to 10.00%/ °C Reference Temperature: 20 or 25 °C
IP Protection		P67
Housing		ABS / PC
Communication		Micro-USB

more info Ohaus 30059257 Zero Oxygen Chemicals STARTER more info Price: $27.00 In Stock DO Zero Oxygen powder more info Ohaus 30031635 Portable Starter Bag for Meters and Electrodes more info Price: $72.90 In Stock Ohaus 30031635 Portable Starter Bag for Meters and Electrodes more info Ohaus STDO21 Starter Series Dissolved Oxygen (DO) Probe Cap more info Price: $186.75 In Stock Ohaus STDO21 Starter Series Dissolved Oxygen (DO) Probe Cap