Wireless Heavy-Duty Pressure Transmitters

 

Model APTSS-20 Wireless Pressure Transmitters are developed from Heavy-duty Pressure Transmitter for remote wireless applications. In hazardous conditions or places where there is no power supply available, this APTSS-20 is useful and finds many applications, e.g., in oil wells of explosive gas or at places which are either dangerous to people or no power supply available to access. To fit to such the application, the housing of APTSS-20 is sealed tightly to meet the requirements for explosion proof of Exd IIC T5 Gb, Exia IIB T4 Ga and for environment protection of IP66.

In order for different remote distances and data transmission rates, model APTSS-20 is manufactured to have different communication protocol, like LoRa (Long Range) or Zigbee, for wireless communication. LoRa is one of LPWAN (low-power wide-area-network) protocols, and is suitable for communication of a longer distance (up to kilometers). Zigbee on the other hand is suitable for communication of a shorter distance (a few hundred meters).

To fit various pressure media, three types of pressure port (type-A, -B and -C) are available. Type-A (so-called inner cavity) has its pressure diaphragm located inside the port. This type of pressure port is designed to measure gases or dilute liquids. Type-B (so-called flush diaphragm) has its pressure diaphragm in front of the pressure port and is suitable for measuring viscous fluids, fluids with particles or paste, so that the pressure medium can be flush-washed away from the surface of the diaphragm. Type-C (so-called tri-clamp) has no thread and can be connected via a clamp. This type of pressure port is designed for application in either pharmaceutical or food industries.

Applications：

● pressure measurement at locations with hazardous conditions

● pressure monitoring in oil wells, oil transportation or oil processes

● pressure measurement at location without power supply

 

● wireless communication protocol: LoRa, Zigbee

● communication distance: up to 2km

● pressure ranges: -1~0barG, ..., ~1000barS

● accuracy: 0.5%fs

● material of pressure diaphragm: 316L SS

option: Hastelloy-C

● explosion proof:Exd IIC T5 Gb, Exia IIB T4 Ga

● environment protection: IP66

 

 

Parameters		Units	Specifications	Notes
pressure medium	type-A		gases or dilute liquids	1
	type-B		viscous fluids or fluids with particles
	type-C		hygienic applications, e.g., food industry or pharmaceutical industry
pressure references & ranges	gauge	bar	-1~0, 0~0.1, ~0.2, ~0.35, ~0.7, ~1, ~2, ~4, ~6, ~10, ~16, ~20, ~35	2
	absolute	bar	0~0.35, ~0.7, ~1, ~2, ~4, ~6, ~10, ~16, ~20, ~35, ~70, ~100, ~250, ~400
	sealed gauge	bar	0~600, ~1000
proof pressure		%fs	200 in case of range < 100bar, 150 in case of range ≥ 100bar	3
burst pressure		%fs	300 in case of range < 100bar, 200 in case of range ≥ 100bar
wireless communication protocol			LoRa (standard), Zigbee	4
communication distance		m	LoRa: ≥ 2000, Zigbee: ≥ 200
sending data rate			1 time per 1 min, ..., 1 time per 12 hours (adjustable on site)
accuracy		%fs	better than ±0.5	5
long-term stability		%fs/year	better than ±0.2
supply volatge		Vdc	3.6	6
battery life		year	≥ 2 in case of data sending rate slower than 1 time per 2 hours	6
medium temperature range		°C	-40 ~ +125
ambient temperature range		°C	-40 ~ +85
storage temperature range		°C	-40 ~ +85
compensated temperature range		°C	-10 ~ +70 (0~50°C in case of ranges ≤ 2bar)
temperature coefficient of zero		%fso/°C	≤ ±0.03	7
temperature coefficient of span		%fso/°C	≤ ±0.03	7
process connection	type-A		M20x1.5 male thread, other threads are available on request
	type-B		G1/2 male thread, other threads are available on request
	type-C		DN50, other dimensions are available on request
pressure diaphragm			316L SS (standard), Hastelloy-C
wetted parts material			316 SS
electronics housing material			aluminum alloy
environment protection			IP66
explosion proof			Exd IIC T5 Gb, Exia IIB T4 Ga
display			4 ½ digits LCD display
net weight		kg	~2

Notes:

1. The pressure medium should be compatible with wetted parts material and pressure diaphragm.

2. For customized pressure ranges, consult Atechsensor.

3. “fs” refers to full scale pressure or rated pressure.

4. Communication frequency of LoRa is 433kHz while that of Zigbee is 2.4GHz.

5. Accuracy = sqrt (non-linearity2 + hysteresis2 + repeatability2).

6. AA batteries of 19Ah total capacity are employed.

7. Calculated as a rate of output change between -10°C and +70°C or between 0°C and 50°C, and normalized by the output at 25°C.