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A TDS meter is also commonly called a TDS tester, water quality tester, PPM (parts per million) tester, or a water purit...
18/10/2026

A TDS meter is also commonly called a TDS tester, water quality tester, PPM (parts per million) tester, or a water purity pen.

Alternative and Related Names

• EC Meter (Electrical Conductivity Meter): Often combined into a single device (EC/TDS meter) because a TDS meter actually measures electrical conductivity and converts that value into a TDS estimate.

• Hydro-tester / Nutrient Tester: Frequently used in hydroponics, gardening, and aquaculture to measure nutrient concentrations.

• Inline TDS Meter: A fixed-mount device (such as the AutoAqua Titanium One) installed directly onto water filtration or reverse osmosis (RO) tubing

pH meter Meter name : potentiometric pH meterA pH meter is an electronic instrument used to measure the hydrogen-ion act...
18/10/2026

pH meter
Meter name : potentiometric pH meter

A pH meter is an electronic instrument used to measure the hydrogen-ion activity (acidity or alkalinity) in water-based solutions. It is also known as a potentiometric pH meter

Main Types of pH Meters

• Pen Testers:
Pocket-sized, all-in-one portable devices ideal for quick checks in hydroponics, pools, and food processing (e.g., ETI pH PAL Plus or Aquasol Digital Pen Type).

• Handheld Meters:
Rugged, field-use meters featuring separate, interchangeable electrode probes for environmental and agricultural work.

• Benchtop Meters:
Larger, laboratory-grade, desk- or wall-mounted units offering the highest precision and features like USB outputs (e.g., VTSYIQI Laboratory Benchtop pH Meter).

Magnehelic gaugeMagnehelic gauge is an analog differential pressure instrument used to measure positive, negative, or di...
18/10/2026

Magnehelic gauge

Magnehelic gauge is an analog differential pressure instrument used to measure positive, negative, or differential pressures of air and non-combustible, compatible gases
Depending on the context, TSP and ESP refer to measurements used in either HVAC duct design or Radio/Electronics testing. The specific names of the meters used are:

1. HVAC Systems (Airflow & Duct Resistance)

In heating, ventilation, and air conditioning, TSP stands for Total Static Pressure and ESP stands for External Static Pressure.

• Meter Name: Manometer (specifically a digital manometer or a dual-port manometer), or an analog Magnehelic Gauge.

• How it works: Technicians insert static pressure probes into the ductwork to measure the "pushback" or resistance the fan must overcome.

Chilled water balancing with a GPM (Gallons Per Minute) flow meter measures and adjusts the fluid flow rate through HVAC...
18/10/2026

Chilled water balancing with a GPM (Gallons Per Minute) flow meter measures and adjusts the fluid flow rate through HVAC terminal units (like fan coils, air handling units, and chillers) to match design specifications.

Meter name : (Manometer)

• Portable Differential Pressure (Manometer) Kits: Traditional double-regulating valves (DRVs) use twin test ports. Technicians attach a hydro-manometer with hoses to measure the pressure drop (Δ P) across the valve and cross-reference it with the manufacturer's \(K_{v}\) or \(K_{vs}\) curve to determine current GPM.

air balancing meter Meter name: balometer An air balancing meter is most commonly known as a balometer (also called an a...
18/10/2026

air balancing meter
Meter name: balometer

An air balancing meter is most commonly known as a balometer (also called an airflow capture hood or air volume hood).

What is cfm meter and meter name Meter name : thermo-anemometerA CFM meter (Cubic Feet per Minute meter) or thermo-anemo...
18/10/2026

What is cfm meter and meter name

Meter name : thermo-anemometer

A CFM meter (Cubic Feet per Minute meter) or thermo-anemometer is a device used to measure air velocity, volume, and temperature in HVAC ducts, ventilation systems, and industrial environments.

What a CFM Meter Does

• Measures Air Speed: Reads air velocity in feet per minute (FPM) or meters per second.
• Calculates Volume: Multiplies air speed by duct cross-sectional area to display volume in CFM (Cubic Feet per Minute) or CMM (Cubic Meters per Minute).
• Tracks Temperature: Measures ambient air temperature simultaneously.

Common Types of CFM Meters

• Vane Anemometer: Uses a rotating fan or impeller wheel to measure airflow; popular for general HVAC balancing and grilles.
• Hot-Wire Anemometer: Uses a heated wire sensor to measure low-speed airflows with high precision in tight spaces.
• Manometer with Fan Charts: Technicians also estimate CFM by measuring static pressure with a manometer and checking manufacturer fan charts, according to a consensus on

Honeywell T7560A,B,C DIGITAL WALL MODULE Honeywell excel 5000 open system VARIABLE AIR VOLUME CONTROLLER
18/10/2026

Honeywell T7560A,B,C DIGITAL WALL MODULE
Honeywell excel 5000 open system

VARIABLE AIR VOLUME CONTROLLER

Honeywell T7560A,B,C DIGITAL WALL MODULE Honeywell excel 5000 open system
18/10/2026

Honeywell T7560A,B,C DIGITAL WALL MODULE
Honeywell excel 5000 open system

What Is a Solid State Relay?A Solid State Relay (SSR) is a relay that does not have a moving contact. In terms of operat...
18/10/2026

What Is a Solid State Relay?
A Solid State Relay (SSR) is a relay that does not have a moving contact. In terms of operation, SSRs are not very different from
mechanical relays that have moving contacts. SSRs, however, employ semiconductor switching elements, such as thyristors,
triacs, diodes, and transistors.

77.01.9.024.8050 Solid State Relays (SSR)

kriwan olc-k1 optical oil level control sensor wiring• Supply Voltage: 115/230 VAC (50/60 Hz, 3VA) or 24 VAC/VDC dependi...
18/10/2026

kriwan olc-k1 optical oil level control sensor wiring

• Supply Voltage: 115/230 VAC (50/60 Hz, 3VA) or 24 VAC/VDC depending on the specific model variant.
• Relay Rating: Max 240 VAC, 2.5A continuous.

• Delay Times: 90-second start delay; 5-second reaction/relay switch delay.

• Reset Procedure: Interrupt power supply to the brown and blue wires for at least 5 seconds to clear a lockout

Wire Color Functions

• Brown: L (Phase) – Power supply input (typically 115V or 230V AC).

• Blue: N (Neutral) – Power supply neutral.
• Grey: C (Common signal) – Common terminal for the internal safety relay.

• Orange: NO (Normally Open) – Normally open relay contact; closes when oil level is normal.

• Pink: NC (Normally Closed) – Normally closed relay contact; closes during a low-oil trip or lock-out.

• Violet: D1 (Compressor running) – Run-proof / operation recognition input. Must receive live control voltage only while the compressor is running.

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