เครื่องวัดคุณภาพน้ำ pH/EC/TDS Hanna Grochek Combo Monitor HI 991404 pH EC TDS Meter – gro chek hydroponics (pre-order) from USA

ate — Tue, 22 Dec 2015 03:13:03 +0000

เครื่องวัดคุณภาพน้ำ pH/EC/TDS Hanna Grochek Combo Monitor HI 991404 pH EC TDS Meter – gro chek hydroponics (pre-order) from USA

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The Combo HI 991404 meter is designed for continuous, high accuracy pH, EC/TDS and temperature measurements. These microprocessor indicators continuously monitor the three most important nutrient parameters in hydroponics, greenhouses and horticultural applications with a single instrument. These indicators feature a large, dual-level, backlit LCD to give you instantaneous readings of pH, EC or TDS and temperature, even from a distance.

At startup, these indicators perform a self-check to assure proper working condition. HI 991404 stability indicator and hold features prompt the user when to take the reading and freezes the display for easy and accurate recording.

Calibration and temperature compensation is automatic, while the EC/TDS conversion factor and temperature coefficient (ß) are user adjustable for application-specific measurements.

These instruments are supplied with an advanced, non-clogging double junction pH electrode and a rugged conductivity probe that will withstand even the most aggressive environments. The instruments are powered by a 12 volt dc transformer and are easy to install and use.

Hanna HI 991404 pH/EC/TDS/Temperature Monitors

Non-clogging double junction pH electrode for prolonging meter life
Automatic calibration and temperature compensation for ease of use
Self-check and stability indicator to indicate when to take a reading
Large LCD screen for readability
12 Vdc power adapter for prolonged use

Range	pH	0.0 to 14.0 pH
	EC	0 to 3999 µS/cm
	TDS	0 to 2000 mg/L (ppm)
	Temperature	0.0 to 60.0°C / 32.0 to 122.0°F
Resolution	pH	0.1 pH
	EC	1 µS/cm
	TDS	1 mg/L (ppm)
	Temperature	0.1°C (0.1°F)
Accuracy @ 20°C	pH	±0.1 pH
	EC/TDS	±2% F.S.
	Temperature	±0.5°C (±1°F)
Temperature Compensation	pH	automatic
	EC/TDS	automatic with ß adjustable from 0.0 to 2.4%/°C
Calibration	pH	automatic, one or two points with auto-buffer recognition
	EC/TDS	automatic, one point at 1413 µS/cm or 1382 ppm
TDS Factor		adjustable from 0.45 to 1.00
Environment		0 to 50°C (32 to 122°F); RH max 95% non-condensing
Input Impedance		10¹² Ohm
Power Supply		12 VDC adapter (included)
Dimensions/Weight		160 x 105 x 31 mm (6.3 x 4.1 x 1.2) / 190 g (6.7 oz.)
Probes	pH	HI 1293D PEI body, pre-amplified pH electrode with 1/2” NPT pipe thread, DIN connector and 2 m (6.6’) cable (included);
	EC/TDS	HI 7630 conductivity probe with 1/2” NPT pipe thread and 2 m (6.6’) cable(fixed)

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