Look no further. Excellent product quality， that's solidly built. Best of all， its very affordable price. Buy this instant.<br />61F-GP-N used for high temperature<br />Control object: clean and waste water<br />Rated voltage: AC 100V/200V 50/60Hz (For shared use)<br />Voltage variation range: 85%～110% of rated voltage<br />Inter-electrode voltage: AC 8V<br />Inter-electrode current: less than about AC 1mA/0.12mA <br />Power consumption: ＜3.5VA<br />Inter-electrode action resistance<br />(Proposed value) about 0~4kΩ 0~1.3kΩ (For 2km use) <br />0~0.5kΩ (For 4km use) about 10kΩ~40kΩ about 0~1.3kΩ about 0~2kΩ <br />Inter-electrode reset resistance<br />(Proposed value) about 15k~∞Ω about 15k~∞Ω 4k~∞Ω(for 2km use)<br />2.5k~∞Ω(for 4km use) about 100k~∞Ω about 4k~∞Ω about 15k~∞Ω <br />Response time: ＜80ms for action， ＜160ms for reset.<br />Cable length: ＜1km， ＜600m， ＜2km， ＜4km， ＜50m， ＜1km， ＜800m<br />Output: AC 250V 3A(Resistive load)， AC 250V(Inductive load cosφ=0.4)<br />Ambient temperature: -10~+55 degrees Celsius， -10～+70 degrees Celsius， -10～+55 degrees Celsius<br />Ambient humidity: 45～85%5RH<br />Delay specification:1S-999S<br />1 x Liquid Level Relay<br />Packed in paper box<br /><img src="http://img6.eachbuyer.com/x13/p19/zv54_1.jpg" />                                                        <img src="http://img6.eachbuyer.com/x13/p19/zv54_2.jpg" />                                                        <img src="http://img6.eachbuyer.com/x13/p19/zv54_3.jpg" />                                                        <img src="http://img6.eachbuyer.com/x13/p19/zv54_4.jpg" />                                                        <img src="http://img6.eachbuyer.com/x13/p19/zv54_5.jpg" />