Brand: JUMO

JUMO AQUIS 500 AS Standard-Signal Indicator and Controller

Name: JUMO AQUIS 500 AS Indicator Controller | Seven Star LLC
Brand: JUMO
SKU: AQUIS 500 AS

Description

One display and controller for any 4-20 mA analytical or level signal

The JUMO AQUIS 500 AS (type 202568) does not measure a single parameter itself. It takes a standard signal, 0(4) to 20 mA or 0 to 10 V, from a transmitter or sensor, scales it to a user unit such as mg/l, pH, mV or µS/cm, and adds limit, alarm and PID control functions. A second analog input accepts a Pt100, Pt1000 or NTC/PTC resistance thermometer for temperature display or compensation, and the instrument supplies 24 V DC at up to 30 mA to power a 2-wire transmitter directly. That makes it a convenient local indicator for the JUMO chlorine sensors of datasheet 202630, for pH or redox 2-wire transmitters of datasheet 202701, and for hydrostatic level probes such as type 402090 or 404390, without a separate loop supply.

Technical specifications

Parameter	Specification
Basic type	202568, JUMO AQUIS 500 AS, indicator/controller for standard signals
Main input	0(4) to 20 mA or 0 to 10 V; display ranges 0.000 to 9.999, 00.00 to 99.99, 000.0 to 999.9 and 0000 to 9999
Main input accuracy	0.6 % of range or better; temperature error 0.2 %/10 °C
Temperature input	Pt100 or Pt1000 (auto detection), -50 to +250 °C, 0.5 K up to 100 °C; NTC/PTC to 4 kΩ via 20-point table
Temperature compensation	pH mode linear -10 to +150 °C; conductivity mode linear 0 to 5.5 %/°C or natural water to ISO 7888
Loop supply	DC 24 V (-15/+20 %), max. 30 mA for a 2-wire transmitter; DC 12 V (10 to 20 V), max. 10 mA for a proximity switch such as type EI1808 NPOSS
Binary input	Floating contact: key inhibit, HOLD, alarm stop
Analog outputs (max. 2)	0/4 to 20 mA (max. 500 Ω) or 0 to 10 V (min. 500 Ω), 0.25 %, electrically isolated 30 V AC / 50 V DC, NAMUR NE43
Relay outputs (max. 2)	SPDT, 3 A at 250 V AC resistive, more than 200,000 operations
Controller	Limit, pulse length, pulse frequency, modulating, continuous; P/PI/PD/PID; 500 ms sampling, 14-bit
Linearisation	Table with 20 value pairs through setup program, for example a horizontal cylindrical tank
Power supply	AC 110 to 240 V (+10/-15 %), AC/DC 20 to 30 V or DC 12 to 24 V; approx. 14 VA
Housing and weight	ABS; IP67 surface mount (approx. 900 g) or IP65 front panel mount (approx. 480 g); up to three M16 and two M12 glands
Ambient temperature	-10 to +50 °C; operating -15 to +65 °C; storage -30 to +70 °C; humidity 90 % annual mean
Approval	cULus, file E 201387, UL 61010-1

Selecting the order code

Order code 202568/ followed by the housing (10 panel mounting, 20 surface mounting), input 888 (0(4) to 20 mA and 0 to 10 V, freely configurable), output 1 and output 2 (000 none or 888 analog), outputs 3 and 4 (000 none or 310 changeover relay), supply 23, 25 or 30 and extra code 000. The datasheet sample is 202568/20-888-888-000-310-000-23/000. Two stock versions are listed: 202568/20-888-888-888-310-310-23/000, part number 00528718, with two analog outputs and two relays, and 202568/20-888-888-000-310-000-23/000, part number 00528719, with one analog output and one relay. Optional installation hardware covers a protective roof, a pipe set, a DIN rail set, a support pillar and a holder for suspension fittings. The PC setup program adds custom display units, the level linearisation table and subsequent language loading.

Typical loops built around it

JUMO shows four reference arrangements. In a pH loop the unit powers a 2-wire transmitter with a compensation thermometer and offers a calibrated analog output, which keeps long cable runs low in interference and moves calibration to the front panel. In a disinfectant loop it pairs with a free-chlorine sensor and a flow monitor, so a missing sample flow can be supervised. For level, a hydrostatic probe feeds the 4-20 mA input and the 20-point table converts depth to litres in a non-linear tank. For flow, a MID flow transmitter of type 406010 supplies the signal. In water-treatment plants in hot climates the same pattern serves dosing control for hypochlorite or peroxide where one local display and two relays are enough. Compare with the AQUIS 500 pH, which includes the sensor interface directly.

For a quotation, tell us the signal source (4 to 20 mA or 0 to 10 V), whether a 2-wire transmitter must be powered from the 24 V loop supply, and the mains or low-voltage supply available at site. State how many relays and analog outputs the loop needs, and whether the housing should be surface mounted at IP67 or placed in a panel at IP65. If a compensation thermometer is used, mention Pt100 or Pt1000, because the unit detects the type automatically. A tank table with up to 20 value pairs is easy to prepare when you send the tank shape and the probe range.

Documents and quotation

Hosted for reference is the JUMO data sheet 202568 (14 pages, English). Confirm the signal type, supply voltage, number of relays and housing before ordering. Seven Star LLC is an independent supplier in Muscat; send the order code and application details for a quotation.

Datasheets & Documents

Datasheet JUMO AQUIS 500 AS data sheet 202568 (EN) Download

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About brand

JUMO is the German maker of temperature sensors, process controllers, pressure transmitters and liquid analysis instruments. Moritz Kurt Juchheim founded it in Fulda in 1948 as M. K. Juchheim KG, making glass thermometers with six employees. The name JUMO comes from the founder's name. It is still a family company headquartered in Fulda, and the parent company has been called JUMO GmbH & Co. KG since 2003.

Seven Star LLC is an independent supplier in Muscat. We list JUMO RTD and thermocouple probes, thermowells, transmitters, controllers, recorders and water analysis instruments, and supply them to process plants, OEMs, HVAC contractors and water utilities in Oman and the GCC by type number.

JUMO company profile

Established	1948, Fulda, Germany, by Moritz Kurt Juchheim
First products	Glass and contact thermometers; platinum glass sensors from 1966
Ownership	Family-owned; renamed JUMO GmbH & Co. KG in 2003
Product families	RTD and thermocouple probes, thermowells, temperature and pressure transmitters, controllers and thermostats, safety temperature limiters, paperless recorders, liquid analysis and flow and level instruments

Milestones

1948: Moritz Kurt Juchheim founds M. K. Juchheim KG in Fulda, making glass thermometers with six employees.
1966: Platinum glass temperature sensors are added.
2003: The parent company is renamed JUMO GmbH & Co. KG.

JUMO products we list

Family	Models	Typical use
RTD and thermocouple probes	902020, 902030, 902050, 902120, 902006 2xPt100, PROCESStemp, mineral-insulated RTD, 901020 thermocouple, 901210, 902810 hygienic, 902550 surface, 902520 HVAC, MarineTemp	Temperature measurement in pipes, vessels, machines, HVAC and food plants
Thermowells and inserts	909710 thermowells, 909740 measuring inserts	Protecting sensors and replacing them without opening the process
Temperature transmitters	dTRANS T01, T03, T04, T05, T06 SIL, T07 HART, T09, T1000 IO-Link, DELOS T switch	Converting sensor signals to 4-20 mA, HART or IO-Link
Pressure and level	dTRANS p20, p30, p31 hygienic, p33 Ex, p02 DELTA, MIDAS S05, MIDAS DP10, DELOS S02, MAERA S25, NESOS R20	Pressure in process, hydraulic and OEM systems; tank and well level
Controllers, limiters and recorders	DICON touch, IMAGO 500, dTRON 316, iTRON, cTRON, diraTRON 104, eTRON T, safetyM STB/STW, safetyM TB/TW, LOGOSCREEN 601, mTRON T	Furnace, oven and process control, over-temperature protection and recording
Liquid analysis and flow	AQUIS touch S, AQUIS touch P, AQUIS 500 pH, AQUIS 500 CR, dTRANS pH 02, pH electrode, digiLine DO, ecoLine NTU, flowTRANS MAG H20, flowTRANS US W01	pH, conductivity, oxygen and turbidity in water treatment; liquid flow

Choosing a temperature sensor starts with the range and accuracy. A Pt100 RTD is accurate and stable from about -200 to 600 °C and is the usual choice in process plants. A thermocouple (type K or J, for example) covers much higher temperatures and responds faster but is less accurate. The wiring also matters: a 3-wire or 4-wire Pt100 connection cancels the resistance of the cable, while a 2-wire connection adds an error that grows with cable length. That is why a head-mounted transmitter is often fitted close to the sensor.

Where JUMO products are used

In Oman and the GCC, JUMO sensors and controllers are used in oil and gas and chemical plants, food and beverage production, plastics and metal heat treatment, HVAC and district cooling, water and wastewater treatment, swimming pools and marine applications.

Ordering JUMO products: what we need

Send the JUMO type number and the full order code from the label (for example 902020/10-...). For probes, add the sensor type (Pt100, Pt1000, type K or J), the number of wires, the insertion length and diameter, and the process connection. For controllers, add the input, outputs and supply voltage.

Facts checked against JUMO's company history, October 2026.

Browse JUMO products by category: Temperature Instrumentation, Pressure Instrumentation, Liquid Analysis Sensors, Controllers & Data Acquisition, Level Transmitter.