Digital pH Meter for Water/Chemistry/Medicine, ORP Test

Size chart

Clothing Size Conversion Chart
Category	US	EU	UK	Chest (in)	Waist (in)	Hips (in)
Men	XS	44	34	32-34	26-28	33-35
	S	46	36	34-36	28-30	35-37
	M	48	38	38-40	32-34	39-41
	L	50	40	42-44	36-38	43-45
	XL	52	42	46-48	40-42	47-49
Women	XS	32	6	31-32	24-25	33-34
	S	34	8	33-34	26-27	35-36
	M	36	10	35-36	28-29	37-38
	L	38-40	12-14	37-39	30-32	39-41
	XL	42	16	40-42	33-35	42-44
Youth	XS	128	7	26-28	23-24	26-28
	S	134	8	28-30	24-25	28-30
	M	140	10	30-32	25-26	30-32
	L	146	12	32-34	26-27	32-34
	XL	152	14	34-36	27-28	34-36

Pants Size Conversion Chart
Category	US	EU	UK	Waist (in)	Hip (in)	Inseam (in)
Men	28	44	28	28	34	30
	30	46	30	30	36	31
	32	48	32	32	38	32
	34	50	34	34	40	33
	36	52	36	36	42	34
Women	0	32	4	24	34	30
	2	34	6	25	35	30
	4	36	8	26	36	31
	6	38	10	27	38	32
	8	40	12	28	40	32

Shoes Size Conversion Chart
Category	US	EU	UK	Foot Length (in)
Men	6	39	5.5	9.25
	7	40	6.5	9.625
	8	41	7.5	10
	9	42	8.5	10.25
	10	43	9.5	10.625
	11	44	10.5	11
	12	45	11.5	11.25
	13	46	12.5	11.625
Women	5	35	2.5	8.5
	6	36	3.5	8.875
	7	37	4.5	9.25
	8	38	5.5	9.625
	9	39	6.5	10
	10	40	7.5	10.25
	11	41	8.5	10.625
	12	42	9.5	11
M (Unisex)	5	37	4.5	8.75
	6	38	5.5	9
	7	39	6.5	9.5
	8	40	7.5	10
	9	41	8.5	10.25
	10	42	9.5	10.625
	11	43	10.5	11
	12	44	11.5	11.25

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Digital pH detector offers a wide range of electrode options to suit specific industry needs, including combination electrodes for sewage disposal, PTFE electrodes for chemical industries, and specialized high-temperature electrodes for food safety. The built-in alarm relay system offers reliable safety features, with dual alarms for high and low threshold limits.

Specification

Model	T-PHM-PHCR-PH160
Weight	1kg
Dimension	9696100mm (HWD) with hole size 92*92mm
Measuring range	pH: 0~14pH, ORP: -1000~1000mV (-2000~2000mV can be customizable)
Accuracy	±0.02pH, ±1mV
Resolution	±0.01pH, ±1mV
Stability	≤0.02pH/24h, ≤3mV/24h
Input impedance	≥10^12Ω
Temperature range	0~100℃ (NTC 10K, accuracy: ±0.5℃)
Temperature compensation	0~100℃ manual/automatic
Output signal	Isolated 4-20mA signal (error: ±0.2%, under maximum loop resistance 750Ω)
Communication function	RS485 with standard MODBUS-RTU (Now RS485 software is free.)
Power supply	AC 220V±10%, 50Hz/60Hz DC 24V
Alarm relay	2 alarm relays: AC 250V/3A Function: high alarm, low alarm

Digital pH Meter User Manual

T-PHCON-PH160 pH Controller User Manual.pdf

Feature

The pH meter offers a range of customizable user settings, including language selection, buzzer control, LCD backlight adjustment, and password protection for added security. Users can also configure the pH/ORP electrode selection, choose between manual or automatic temperature compensation, and perform pH/ORP calibration. Additionally, the device allows for modification of pH/ORP and temperature settings, setting high/low alarms for pH/ORP levels, and selecting output signal options such as 4-20mA and RS485, providing flexibility to meet various application needs.
Equipped with an internal industrial watchdog to prevent the device from crashing.
2.4-inch LCD display for clear and easy readings.
Excellent anti-interference performance for reliable measurements.
Supports both manual and automatic temperature compensation.

The pH meter and pH/ORP electrode selection:

pH/ORP electrode	Industry	Temperature range	Advantage
Pure water pH electrode	Drinking water	0-60℃ (32-140℉)	The pH calomel electrode can be used in strong acid or alkali.
PTFE pH electrode	Chemical	0-60℃ (32-140℉)	The electrode shell is made of PTFE, suitable for corrosive solution (strong acid or alkali), has longer life in harsh environments.
pH glass electrode	Sewage disposal / food	0-95℃ (32-203℉)	Direct lead, double-layer glasses.
Desulfurization pH electrode	Desulfurization	0-60℃ (32-140℉)	Flat electrode, strong anti-pollution ability and longer life

The pH/ORP meter diagram of ports definition:

INPUT: Measuring terminal of the electrode
REF: Reference terminal of the electrode
NC: Undefined
TEMP2: Temperature compensation terminal 2
TEMP1: Temperature compensation terminal 1
RS485 (A+): RS485 communication interface A+
RS485 (B-): RS485 communication interface B-
4-20mA (+): 4-20mA output terminal +
4-20mA (-): 4-20mA output terminal –
AC 220V (L) or DC 24V (-): AC 220V liver wire or DC 24V negative
AC 220V (N) or DC 24V (+): AC 220V liver wire or DC 24V positive
LO: Normally-open relay for low alarm
HI: Normally-closed relay for high alarm

Communication:
RS485 communication data and register address as follows:

Address	Data type	Function code	Explanation	Access right
0x0000	unsigned short	0x03	pH value (default in two decimals)	Read only
0x0001	unsigned short	0x03	Temperature value (default in one decimals)	Read only
0x0002	short	0x03	ORP value (signed integer)	Read only

Tips: What is ORP and why is it important?

ORP (Oxidation-Reduction Potential) measures the ability of a solution to either accept or donate electrons. It is a critical indicator in water treatment, chemical reactions, and biological systems. ORP helps determine the oxidative or reductive properties of the solution, which can indicate the presence of pollutants, chemical reactions, or the effectiveness of disinfection.